Malicious PDF — malware analysis report

Static analysis result for SHA-256 4655db08208b3744…

MALICIOUS

PDF

12.3 KB
MD5: 5ed0e096502a9867904e2458e2d83a6e SHA-1: feb2b1b603e7f6f56149f90e179408a064b6495e SHA-256: 4655db08208b3744333344169ac0ad587b67a6c733c4e3d410744d87f985746a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. ClamAV detections (Pdf.Exploit.Agent-36365 and Pdf.Exploit.Agent-36364) confirm its malicious nature, suggesting it exploits a known vulnerability. The embedded JavaScript is the primary mechanism for delivering a secondary malicious payload.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
  • 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_obj0076_000.js
ca7833c992b0d43f13db824cb9831725a516419f3379ca3999daf019d6483c69
pdf-javascript-stream PDF /JS object 76 at offset 0x369 11541 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely