Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 061c3d07d9fedeef…

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: d027211f72b9ce3560aeedf59ea3b9d6 SHA-1: 6da880cd441e08d04f311473075e93cdacc7e1dc SHA-256: 061c3d07d9fedeef5876a9d79b12d5db4f46bf6d608544258fc57ed101c2a439
166 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, which identified it as Win.Trojan.Agent-36166. It contains embedded JavaScript that is likely responsible for downloading and executing a second-stage payload. The obfuscated nature of the script prevents a more detailed analysis of its specific actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-36166
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
7ce121a952ae744954bf5e191da5cf680ad4c39ab74a457ddd51d44b1d76159d		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74699 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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