Mobile App Security Testing: Uncover Threats Hidden Beyond the Surface
Your mobile application clears every marketplace review and serves thousands of users daily. They depend on it for sensitive operations. But what occurs when a skilled adversary targets it intentionally? At Pentestas, we deconstruct your iOS and Android applications, defeat defensive mechanisms, and map out every exploitable weakness an attacker could leverage — so you can close those gaps first.
The Unique Threat Landscape of Mobile Applications
A mobile app is fundamentally different from a server-side web application. The compiled binary lives on hardware controlled by the end user. Local file systems are inspectable, network calls can be intercepted through proxies, and modified operating systems strip away platform safeguards. In practice, every installed app is a portable attack surface that follows the user everywhere.
| Attack Surface | Web App | Mobile App |
|---|---|---|
| Binary Access | Runs on server | Downloadable and decompilable by anyone |
| Local Storage | Cookies and web storage | Keychain, SharedPreferences, SQLite, flat files |
| Certificate Pinning | Rarely relevant | Critical control — and commonly circumvented |
| Biometric Authentication | Minimal (WebAuthn) | Face ID, Touch ID, fingerprint — all hookable |
| Push Notifications | Rudimentary | Potential channel for sensitive data exposure |
| Deep Links | Standard URLs | Custom schemes, Universal Links, App Links |
| Inter-App Communication | Not applicable | Intents, Content Providers, custom URL handlers |
| Device Sensors | Restricted | GPS, camera, mic, NFC, Bluetooth access |
Platform-Specific Testing: iOS and Android
Every operating system enforces its own security model — and each one can be undermined in distinct ways. Our engineers are deeply versed in both.
iOS Testing
- IPA extraction and binary reverse engineering (class-dump, Hopper Disassembler)
- Keychain data storage and protection class assessment
- App Transport Security (ATS) policy validation
- Objective-C/Swift runtime hooking and method swizzling (Frida, Cycript)
- Jailbreak detection effectiveness and bypass testing
- Universal Links and custom URL scheme abuse testing
- TLS certificate pinning defeat (SSL Kill Switch, Objection)
- Data Protection API tier verification
Android Testing
- APK reverse engineering and manifest analysis (jadx, apktool)
- SharedPreferences, SQLite, and internal file storage inspection
- Exported Content Providers and Intent filter security
- Smali bytecode modification and app repackaging
- Root detection circumvention (Magisk, Frida hooking)
- Deep link handler and WebView exploitation vectors
- Network security config and certificate pinning bypass (Frida scripts)
- Android Keystore and hardware-backed key review
Our Six-Step Mobile Security Assessment Process
A disciplined, transparent workflow that systematically examines every layer — from compiled code to final deliverable.
Scoping and Environment Preparation
Retrieve the application from the App Store and Google Play, configure jailbroken iOS and rooted Android test devices, set up Burp Suite as an intercepting proxy, and capture baseline network traffic. We catalog every API endpoint, embedded SDK, and external service integration so nothing is overlooked during active testing.
Static Code and Binary Review
Disassemble and decompile the application binary using jadx, apktool, class-dump, and Hopper. We hunt for embedded secrets such as API tokens, encryption keys, and service credentials. We chart out server endpoints compiled into the binary, audit cryptographic logic, and examine every bundled third-party library for documented vulnerabilities and privacy leaks.
Runtime and Dynamic Testing
Live instrumentation using Frida and Objection to hook into application methods, subvert authentication flows, alter runtime behavior, probe biometric verification bypasses, neutralize jailbreak and root detection, and decode encrypted traffic on the wire. Every protective measure is stress-tested under hostile conditions to determine its true resilience.
Traffic Interception and API Assessment
Perform man-in-the-middle capture of all outbound and inbound app communications. Circumvent certificate pinning to inspect otherwise opaque TLS sessions. Conduct thorough API authentication and authorization testing, probe business logic for manipulation, assess rate-limiting effectiveness, and flag data exposure risks. We scrutinize every HTTP request the app generates — including undocumented endpoints.
Exploit Development and Attack Chaining
We link individual weaknesses into multi-step attack narratives that illustrate genuine business consequences. A minor information disclosure becomes part of a chain leading to full account compromise; a defeated security check opens the path to wholesale data exfiltration. Every proof of concept is designed to demonstrate tangible, real-world impact rather than hypothetical risk.
Deliverables and Remediation Guidance
A concise executive briefing for stakeholders, granular technical findings scored with CVSS, precise reproduction steps, and platform-tailored remediation instructions. Each issue includes developer-oriented fix recommendations with sample code for iOS and Android. We conclude with a live walkthrough session where your team can ask questions about every reported finding.
Complete OWASP Mobile Top 10 Assessment
Our methodology is aligned with the full OWASP Mobile Top 10 (2024) — the globally recognized benchmark for mobile application threat categorization.
Improper Credential Usage
CriticalEmbedded credentials in source, insecure secret storage, mishandled authentication tokens, API key leakage within binaries
Plaintext API keys discovered in resources, session tokens persisted in SharedPreferences, credentials embedded in plist configuration files
Inadequate Supply Chain Security
HighThird-party library audit, known CVE scanning across dependencies, supply chain integrity verification, detection of compromised packages
Outdated libraries with publicly disclosed exploits, telemetry SDKs transmitting personal data, advertising frameworks requesting excessive device permissions
Insecure Authentication/Authorization
CriticalBiometric verification bypass, session lifecycle management, server-side token validation, privilege escalation paths, IDOR in mobile-facing APIs
Biometric gates defeated via Frida instrumentation, predictable session identifiers, broken object-level authorization on sensitive endpoints
Insufficient Input/Output Validation
HighSQL injection vectors, cross-site scripting within WebViews, directory traversal, format string vulnerabilities, deep link parameter injection
Script injection through crafted deep links, local SQLite injection flaws, persistent XSS in embedded browser components
Insecure Communication
HighCertificate pinning validation and bypass, detection of cleartext transmissions, TLS configuration strength, susceptibility to MITM interception
Absent certificate pinning on key endpoints, fallback to unencrypted HTTP, deprecated cipher suites, credentials transmitted without encryption
Inadequate Privacy Controls
MediumPersonal data appearing in debug logs, clipboard content leakage, sensitive screen capture caching, over-collection by analytics integrations
User credentials written to system log output, personally identifiable information forwarded to third-party analytics, cached screenshots containing financial details
Insufficient Binary Protections
MediumResistance to reverse engineering, code obfuscation quality, anti-tampering controls, debugger attachment prevention, jailbreak/root detection robustness
Unobfuscated codebase, trivially bypassed jailbreak checks, no anti-debug measures, straightforward APK repackaging
Security Misconfiguration
HighBackup permission flags, residual debug settings, exported components without access guards, overly broad permissions, insecure WebView configuration
Production build with debug flags active, android:allowBackup left enabled, exported Activities lacking intent filters, JavaScript execution permitted in WebViews
Insecure Data Storage
CriticalKeychain/Keystore utilization audit, file system permission checks, database encryption status, temporary file and cache analysis
Sensitive records stored as plaintext on disk, unencrypted SQLite databases, authentication tokens placed in UserDefaults rather than Keychain
Insufficient Cryptography
HighCipher algorithm selection, key lifecycle management, initialization vector reuse, custom cryptographic implementations, entropy of random number generation
Encryption keys hardcoded in source, reliance on deprecated hash functions (MD5, SHA1), ECB block cipher mode in use, deterministic initialization vectors
Mobile Frameworks and Platforms We Assess
Different development stacks introduce different security pitfalls. We understand the inner workings of each.
Native iOS
Swift and Objective-C applications with thorough binary disassembly, Keychain data extraction testing, and live runtime manipulation through Frida and Cycript.
Native Android
Kotlin and Java applications with full APK decompilation, Smali-level code patching, exported component auditing, and Android Keystore implementation validation.
React Native
JavaScript bridge attack surface analysis, Hermes compiled bytecode inspection, AsyncStorage content review, and native module permission boundary testing.
Flutter
Dart AOT snapshot reverse engineering, platform channel message interception, Hive and Drift local database inspection, and snapshot-driven code recovery.
Hybrid (Ionic/Cordova)
Embedded WebView security evaluation, Cordova plugin vulnerability scanning, extractable JavaScript source review, and local storage data leakage testing.
Progressive Web Apps
Service worker isolation and manipulation, cache poisoning assessment, Web API permission boundary testing, and offline data retention analysis.
Important: Every framework carries its own threat profile. React Native introduces exploitable JavaScript bridges. Flutter demands Dart-specific reverse engineering. Xamarin requires .NET IL decompilation. Our team is equipped for all of them.
Is Your Mobile App Due for a Security Assessment?
If you recognize any of these situations, it is time to have your mobile application professionally tested.
Mobile Security Testing Packages
Straightforward flat-rate pricing. No billable hours. Detailed quote delivered within one business day.
| Package | Scope | Timeline | Starting Price |
|---|---|---|---|
| Single Platform | iOS OR Android application | 2-3 weeks | $4,800 |
| Dual Platform | iOS AND Android applications | 3-4 weeks | $7,500 |
| Full Stack Mobile | iOS + Android + backend API | 4-6 weeks | $11,500 |
| Ongoing Assurance | Quarterly per platform | Continuous | $3,200/quarter |
Complimentary retest included with every engagement. Once your developers have addressed the reported issues, we validate the patches at no additional charge.
Multi-service engagements qualify for bundled pricing. Reach out for a tailored proposal.
What Sets Pentestas Apart in Mobile Security
The differentiators behind our mobile application security practice.
Physical Device Lab, Not Simulators
Every test runs on actual jailbroken iPhones and rooted Android handsets. Emulators fail to replicate hardware-backed protections like Secure Enclave, physical biometric sensors, and device-specific runtime quirks. Physical devices yield findings that simulators simply miss.
Dedicated Mobile Security Engineers
Each project is handled by a specialist whose primary focus is mobile application security — not a general-purpose tester relying on scanner output. The consultant who defines your scope is the same person who performs the assessment.
Flat-Rate Quotes Within 24 Hours
You receive a definitive cost before any work begins. No time-and-materials billing, no creeping scope, no unexpected charges. We define the engagement, set the price, and deliver precisely what was agreed upon.
Aligned with OWASP MASVS
Our assessments follow the OWASP Mobile Application Security Verification Standard, the internationally accepted framework for mobile security evaluation. Every discovered issue maps directly to MASVS controls, making remediation prioritization straightforward.
Complimentary Remediation Verification
After your team patches the reported vulnerabilities, we revalidate each one at no extra cost. You receive an updated report confirming remediation effectiveness — backed by evidence, not assumptions.
Reports Built for Developers
Our deliverables contain platform-specific remediation guidance complete with code samples. Your iOS and Android developers receive step-by-step implementation instructions — not ambiguous suggestions that demand hours of independent research.
Complementary Security Offerings
API Penetration Testing
In-depth API security evaluation covering REST, GraphQL, and WebSocket interfaces.
Learn more →Web App Penetration Testing
OWASP Top 10 aligned testing for web applications with emphasis on business logic flaws.
Learn more →IT Security Audit
Organization-wide security assessment with a prioritized roadmap for remediation.
Learn more →All Penetration Testing
Browse our complete catalog of penetration testing services across every platform.
Learn more →Millions of users carry your app daily. Ensure it is not their weakest link.
Reserve a complimentary 30-minute discovery call. We will review your mobile application, determine the appropriate testing scope, and return a flat-rate proposal within 24 hours. No pressure, no upsells — just a candid evaluation of where your app stands.