Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2abab8b45a84e15…

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: a9fed1a77ba2f1832fd489c4a6ef70d3 SHA-1: 8c96fd25bc73d16dfd1c654af21df9f372989a3c SHA-256: d2abab8b45a84e15e8041decb8bb482bb3e035e8cf1c0b901cf7352f62a2f176
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript

The critical ClamAV heuristic identified the file as Win.Trojan.Agent-36166. Additionally, low-severity heuristics indicate the presence of JavaScript actions and embedded JS streams within the PDF. While the document body is unreadable, the combination of these indicators suggests the PDF is designed to deliver a malicious payload via its embedded JavaScript. The exact behavior of the script could not be fully determined due to its size and potential obfuscation.

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
f57076d1bee4b95044857c7cc47a4f5cf7395a94e4aa8364f2850aae6834db17		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74650 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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