Malicious PDF — malware analysis report

Static analysis result for SHA-256 25707b48047ab42a…

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: 15d399f97fdc3a29bdd2a74e60d26865 SHA-1: 09b2b41a94513bb61cebe951802d5ad0f591aeb3 SHA-256: 25707b48047ab42a04be8d23b293fc3eed6a709ce903ab956d34264c9550c90e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to execute code. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to exploit vulnerabilities or deliver further malicious content. The primary attack pattern involves leveraging these embedded scripts for malicious execution.

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
e2eaa6d86e4ef532af4e748116876393fd945605c91650c44086d25e240ea403		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74153 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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