Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f93fde07a07b23…

MALICIOUS

PDF

23.3 KB Created: 2011-72-51 03:25:00 Authoring application: ring.fromCharCo
MD5: f2cb0b96cf7a0de34e735202464fa80a SHA-1: 875516f5187cb3070398c9431811b377dd355d0e SHA-256: 74f93fde07a07b237e20e7986fa2694916743615f22bc80ebcc608622a8671d9
106 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that is heavily obfuscated. The script appears to deobfuscate and execute a payload, likely a second-stage downloader, based on the ML classifier and ClamAV detection. The embedded JavaScript is the primary indicator of malicious activity, suggesting an attempt to exploit the user via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-6290660-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-6290660-0
  • 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_obj0001_000.js
e8f87283cff8b3acd412581d6b98e2e60867bf42e7b219c3f7de04f427158dd5		 pdf-javascript-stream PDF /JS object 1 at offset 0x5AB6 434 bytes

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