Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe254a52c8152856…

MALICIOUS

PDF

3.2 KB
MD5: e11790d00be2b801fea46abd5e431838 SHA-1: 6f5bf9451605f9c2b342936f723ea00a5c159c5f SHA-256: fe254a52c81528562cb888dd949835784443448816b620b2c8b887a93655e9ca
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-36121. Static analysis revealed embedded JavaScript, indicating an attempt to exploit vulnerabilities within the PDF reader. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

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
d379827d3f1c00bd30ac74d6b8ca45151658c984782b92be752fb92e2e683d61		 pdf-javascript-stream PDF /JS object 7 at offset 0x9C6 469 bytes

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