Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56706510d0fa6b7…

MALICIOUS

PDF

3.3 KB
MD5: 2829cf28348e3b5dd0d6c49e0aa75a3b SHA-1: 24d9d57eef0a0ca2331dd15294be2ec9cac7a499 SHA-256: c56706510d0fa6b73d226323dca4ed3650746ef762d6c33a891842f2db459511
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1559.001 Component Object Model Hijacking

The PDF file contains embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML_NYX_PDF_MALICIOUS and ClamAV detections strongly suggest malicious intent, specifically targeting PDF vulnerabilities. The embedded JavaScript is likely responsible for exploiting a PDF reader vulnerability to achieve code execution, potentially leading to the download or execution of further malicious payloads. The ClamAV detection name 'Pdf.Exploit.Agent-36121' is included as a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
  • 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
25fbc7f9f12a23696f4a8628ee65b23faf9bcd73fc44c7def7f4ac2e433b3687		 pdf-javascript-stream PDF /JS object 7 at offset 0xA85 329 bytes

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