Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a71a25b18a54fce…

MALICIOUS

PDF

14.4 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 7ce1fade61fbd74c6f9ff2776d52ab07 SHA-1: 73ba6272d2efb1c21cf6b1ca47f49608e7599149 SHA-256: 2a71a25b18a54fced7b44b5115dfa691a399cae05f921413df3e636f3f488cb2
136 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by heuristic firings for PDF_JAVASCRIPT and PDF_JS. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely used to exploit vulnerabilities or download further malicious content, aligning with common PDF-based attack vectors. The document body is unreadable, but the presence of JavaScript and the ClamAV signature strongly suggest a trojan downloader or exploit delivery.

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
719e29b7c825dff30d349d9e4182f3e9483cc09bc4f80c85d3f20d034d42eb4d		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74736 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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