Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b61c9fd594867b…

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: fb7c42c87beb77fca405cff528b7e6ee SHA-1: 9461dfa5ef4c0921448f0f5d9af102c95ad1293c SHA-256: 65b61c9fd594867be1f154b36169010390242bd635c8a9aaec897c71c12e682d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript, identified by multiple heuristics and a critical ClamAV detection (Win.Trojan.Agent-36166). The JavaScript appears to be heavily obfuscated, but its presence and the ClamAV signature strongly suggest it is designed to download and execute a malicious second-stage payload. The document itself is likely delivered as a spearphishing attachment.

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
22845bb418c6345e92fcd203b1dd9531659ffc606adcb57106a6f8b85283da34		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74930 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.