Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ef4ea828f16f43…

MALICIOUS

PDF

3.3 KB
MD5: 3501966813b0ae7254e38fd03f09212d SHA-1: 7c43f94f49f223cd4cc959b84ee2c4639a2b7599 SHA-256: 38ef4ea828f16f43a22c12528af8f54e147857f72e78b3f1cbac9f48858c727e
106 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting it as Pdf.Exploit.Agent-36121. Analysis revealed embedded JavaScript, indicating an attempt to exploit a vulnerability within the PDF reader. The JavaScript is likely responsible for downloading and executing a secondary payload.

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
5990600207c68928b1f7b74a6087451bb49d43e70734c0412f0e79921d99c81e		 pdf-javascript-stream PDF /JS object 7 at offset 0xA88 311 bytes

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