Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2343380a2916a7…

MALICIOUS

PDF

45.0 KB
MD5: f679febdc06ea31f62c11afe06bf9c76 SHA-1: 5b69ffcd57d56653699a9c24c101e6d51e2b53b1 SHA-256: 9b2343380a2916a7d130b445f5842385ba9378eb144a79cb5c8dae9477bb235f
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1553.005 Mark-of-the-Web Bypass

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely responsible for executing the malicious payload, although its specific actions are not detailed in the provided evidence. The presence of XFA forms (PDF_XFA) is also noted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9615

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
db29d16bd553d89d2ba8611760b103149a71ce66286587e564cd78d1467f5ed0		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1D2 3463 bytes

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