Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c2121db5a7ee6b…

MALICIOUS

PDF

11.3 KB
MD5: 342fd94827b9449c84e355aaa84ab481 SHA-1: 46003593c3ac4d74d5c045419e2fc9fe777d4049 SHA-256: 74c2121db5a7ee6b5a0ced6fcc8cb31be6a30f65e1820bd4ee02352ba1286446
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as a known dropper. The JavaScript is heavily obfuscated but its presence and the ML classifier's high confidence indicate it is designed to download and execute a secondary payload. The ClamAV detection name 'Pdf.Dropper.Agent-7273242-0' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-7273242-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7273242-0
  • 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_obj0087_000.js
0e853eb93915e0477ebdecca8ec240a5ce3e69bb641a7f7bc9df20a76e384a31		 pdf-javascript-stream PDF /JS object 87 at offset 0x105 27126 bytes

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