Malicious PDF / .BIN — malware analysis report

Static analysis result for SHA-256 8942a7f9b6aac608…

MALICIOUS

PDF / .BIN

3.3 KB
MD5: fd2645aec37c94ead2b71bbdf1d856b6 SHA-1: bf60e31e9690866cf1a65b2a30a2ae2112d0a5ca SHA-256: 8942a7f9b6aac608f597a041ce8bbe50815b141d7494d442da5ffa32abe35aec
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, flagged by multiple heuristics and a machine learning classifier. The JavaScript decodes a string from the PDF's title metadata and executes it. This executed code likely downloads and runs a secondary payload, as indicated by the 'Pdf.Exploit.Agent-36121' ClamAV detection. The primary attack vector is likely spearphishing attachment.

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
787246d1f154ca9694bccf977e757b0a7fbc77e4ba304f8e71a948f72a2a2cc9		 pdf-javascript-stream PDF /JS object 7 at offset 0xA88 354 bytes

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