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Security audit

PDF Info

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward PDF metadata helper that sends user-provided PDFs or PDF URLs to the documented pdfapihub API.

Install only if you are comfortable sending PDF URLs, uploaded PDFs, or base64 PDF content to pdfapihub for processing. Avoid using it with confidential documents unless the provider's terms, retention practices, and access controls meet your needs.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

External Transmission

Medium
Category
Data Exfiltration
Content
## Example Usage
```bash
curl -X POST https://pdfapihub.com/api/v1/pdf/info \
  -H "CLIENT-API-KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{ "url": "https://pdfapihub.com/sample.pdf" }'
Confidence
60% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Description-Behavior Mismatch

Medium
Confidence
90% confidence
Finding
The example sends a user-supplied remote PDF URL to an external third-party service, which means document processing occurs off-platform and can disclose sensitive document locations or contents to that provider. This is risky because the skill description frames the action as simple PDF info retrieval, while the concrete behavior requires network submission of a remote resource for analysis, creating a data exposure and trust-boundary issue.

Static analysis

No suspicious patterns detected.