Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d142402f7dac3a…

MALICIOUS

PDF

8.5 KB
MD5: 9fd4c792d3de872f04f5f00072b987f8 SHA-1: 7cbd240ed2c74e16e7db9e8d1a5723a0e92b031a SHA-256: 65d142402f7dac3a820bc9e21c03cb1fbf2e3bb3b8743c82bf1af2238cc696b6
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, flagged by multiple heuristics and a machine learning classifier as malicious. ClamAV also detected it as 'Pdf.Dropper.Agent-1828774'. The JavaScript is likely responsible for downloading and executing a secondary payload, a common technique for dropper malware. The specific JavaScript code is heavily obfuscated, preventing a more detailed analysis of its exact actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-1828774 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828774
  • 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_obj0069_000.js
e6d4c2ef09bdf3fcf0e49f0461ed5c40c837386faa91c3568eca4df83824a53e		 pdf-javascript-stream PDF /JS object 69 at offset 0x1BE 19758 bytes

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