Malicious PDF — malware analysis report

Static analysis result for SHA-256 01db00b28ada9e44…

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: 68d0387cfa66ca65d2b238c5ba46e2d6 SHA-1: cc2b989184bea28445818d16a0ca16875034aa43 SHA-256: 01db00b28ada9e4493777361876d9d1f4578e9b74663d181949cbc1cff9f6e45
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Win.Trojan.Agent-36166'. The embedded JavaScript, though obfuscated, is indicative of a downloader or exploit execution. The PDF structure and JavaScript action point towards exploitation for client execution, likely delivered via spearphishing.

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
7ea9954c9f3db08d04352d96a914a498d1bd7c3a5e8a0475592769a6e09c34d8		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75114 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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