Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 a57057b2392e1b88…

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: cd019819b125fa714c897fde0bb937af SHA-1: 8041013a74e1951ad28cb478598c6950c7a6b594 SHA-256: a57057b2392e1b880d7b7a2373dc8b8ce26110bfbbb51105694fa9d84b8f45d0
136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file was detected by ClamAV as Win.Trojan.Agent-36166, indicating it's a known malicious variant. The presence of embedded JavaScript, identified by PDF_JAVASCRIPT and PDF_JS heuristics, strongly suggests that the script is responsible for delivering the malicious payload. The script likely downloads and executes a second-stage payload, consistent with the behavior of the identified Trojan family.

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
e6d362e974aa67fcf602f697197fed2081ee878ef775e8e924acee58673a65cc
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75143 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely