Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa7348b8819a2d1…

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: 6d9c85a9ca8f860b6c75d91f05af7c69 SHA-1: 355a7a64db75a9c98a19cda3002d87f892db72e4 SHA-256: 2fa7348b8819a2d1401ac04721fd9c4d6e3addc6610e9e2d250969354ca2a3f9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

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 arbitrary code. The presence of JavaScript actions and embedded JS streams strongly suggests the document is designed to exploit vulnerabilities or deliver a payload. The exact functionality of the JavaScript could not be determined due to its obfuscation, but its presence is a critical indicator of malicious intent.

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
5d901c9888ec76a52a2a25f81581b954d50475a8d8568b15010bb33caaa776d1		 pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 74323 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely

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