Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec9b3a5f2d167e7…

MALICIOUS

PDF

12.6 KB
MD5: b121ddd981fa4e19b2da8a96ece590fa SHA-1: 905a5ce7b559833e4968671ecd297aaf2cbd5c49 SHA-256: aec9b3a5f2d167e7ef89aa96747b8b000857b80179266a34206b3e281bc6e270
106 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating it contains malicious JavaScript. The embedded JavaScript stream is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code. The specific exploit and its payload are not detailed, but the overall pattern suggests a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Agent-36723 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36723
  • 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
ef1f313ba481e70976cdceb6d2142e13f33fadf7ea6c9db4bb37d3b92457303a		 pdf-javascript-stream PDF /JS object 76 at offset 0x369 11841 bytes

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