Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 534e8b37ab307325…

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: 378e538316926ee5c68c6a316ba8fd8a SHA-1: 56f67173744eef0fa6f5d8c98ca30e10f93ddd99 SHA-256: 534e8b37ab3073255abbe3a3aadc2acd88a4ea70ec80075b111b7ffb98f0edfe
136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was identified as malicious by ClamAV, specifically as Win.Trojan.Agent-36166. This detection, along with the presence of embedded JavaScript actions and streams, strongly suggests that the file is designed to deliver and execute a malicious payload. The embedded JavaScript is likely responsible for the malicious behavior, potentially downloading further stages or exploiting vulnerabilities.

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
170666a732e234921e8b5ca558fb0aa5d577bf465207f96eb5fb6fa1842aa538		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74821 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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