Win.Trojan.Agent-36166 — PDF malware analysis

Static analysis result for SHA-256 546a5d00d203bf86…

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: 766de5c7cf22f5da44024c3e5bd16cbb SHA-1: 97d120f4daf734cfb05940284e176b2711c23079 SHA-256: 546a5d00d203bf862a8d66fa6aaf072bc097b42707a9947e4c68f5a6d0b9848d
136 Risk Score

Malware Insights

Win.Trojan.Agent-36166 · confidence 95%

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

The PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. ClamAV detections of 'Win.Trojan.Agent-36166' strongly suggest the presence of a known trojan. The JavaScript action and embedded JS stream heuristics confirm the use of scripting within the PDF. The extracted artifact 'javascript_obj0007_000.js' is likely responsible for the malicious behavior.

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
455ab2200c6a7ee46d1252b9396bfc8aceb1492ea0c2854d376863c52ff009fb		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75155 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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