Malicious PDF — malware analysis report

Static analysis result for SHA-256 cccc8c3e6016d4bd…

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 5db514ec0bcce789cb398c8346fa7082 SHA-1: 7fe994cd5045fefcd8a9cb6d8b01bb3fdba2eef7 SHA-256: cccc8c3e6016d4bd739d0c9a80a043c555790f6c5234bbbeb8107f2939edb964
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript likely attempts to exploit vulnerabilities or download further malicious content, aligning with common PDF-based attack vectors. The presence of JavaScript actions and streams points towards an attempt to execute code within the context of the PDF viewer.

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
9f3d7611c0e1fb853d2d61f86ac738a34b19c7b75e687e055658824f3d05330a		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75228 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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