Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ccf5a152baac76…

MALICIOUS

PDF

3.3 KB
MD5: 031c5f87a36b269e56486923c04dd378 SHA-1: 5f4ce3d971cf94444cb7d68ec9f2ec0441812014 SHA-256: 37ccf5a152baac76076638ae7ee8d7286d35d36dc4a341f9d256717f850e9319
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities in PDF readers. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact mechanism cannot be determined due to obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
149cca10db9e8a3ed7cbaeeb10d9a08aaae277a9666baaa0440db866e573d5d5		 pdf-javascript-stream PDF /JS object 7 at offset 0xA84 349 bytes

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