Malicious PDF — malware analysis report

Static analysis result for SHA-256 976656bff658d8e5…

MALICIOUS

PDF

14.3 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)
MD5: 95fd069e45a6e8de3a31496f071c6c94 SHA-1: e8afd08128a2dadfb65fb72f936df2f472905f36 SHA-256: 976656bff658d8e527230f6977547df7eb9f75be85569bcdda0fdf7bbfe7eac1
136 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript likely aims to exploit vulnerabilities within the PDF reader or download a secondary payload, aligning with common attack patterns for malicious PDFs. The specific JavaScript content was too obfuscated to determine its exact function, leading to a slightly reduced confidence.

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
4bd6c8bf6c3ad12355054186ee7eded3e7ad256d0f1896df934886c90df37e18		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74274 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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