Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33bfaf35b6376dc…

MALICIOUS

PDF

12.5 KB
MD5: 7cf1addcab3afc3ff08770c81d87e841 SHA-1: 0c3ddec326a289d5f61efbef7be2602a80f8b0e5 SHA-256: b33bfaf35b6376dc9b1c0073a4bf34990d79ba7773040f26403fea83cf65d3cb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: 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. The embedded JavaScript is the primary mechanism for exploitation, likely serving as a downloader for further malicious activity.

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
0da9ee5f534d43def50c905933d5553ed09ea167ef533b78af6e3ce004810006		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11692 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36364
Obfuscation or payload: unlikely

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