Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b5f39ea570da30…

MALICIOUS

PDF

14.7 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: aa6a97d02bacc8b7bae685645ddf7b93 SHA-1: 5781eaca6e8e8f28c95fe953c430e2efd2dc40f8 SHA-256: a3b5f39ea570da30b9f5dd4567927ea334e86347a5b6233947cb5c517a7736d7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/Shell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The embedded JavaScript is likely responsible for executing the detected malware payload.

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
c117a74229c8de21df9121ffc328553863237a2ba0123c2a11878518000306e0		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 76521 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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