Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2ba92bb52bdfd7…

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: fb995d9eadc3058a89827dff4731db70 SHA-1: ec1fdba53228358781824ad9510b5de56ee7c9f9 SHA-256: cd2ba92bb52bdfd7ca6587f127d50c2eac39fdb838ba033716df153b372cfe31
166 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection (Win.Trojan.Agent-36166). The presence of embedded JavaScript actions and streams strongly suggests that the script is designed to download and execute a second-stage payload. The file's SHA256 hash is cd2ba92bb52bdfd7ca6587f127d50c2eac39fdb838ba033716df153b372cfe31.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
1a10b7b1030ee5f165197b280178e83c305ac228d331d949137cb60362a1f201
pdf-javascript-stream PDF /JS object 7 at offset 0x1A5 75197 bytes
Detection
ClamAV: Win.Trojan.Agent-36166
Obfuscation or payload: unlikely