Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac904f283a9dd8d…

MALICIOUS

PDF

45.3 KB
MD5: f85420f8e10171e3b7e3107213d91a8c SHA-1: 8c76c08ed329f2008d4b400dd651a4aace6f300a SHA-256: aac904f283a9dd8d1a22a327c09f814332e12c6fb8b2343f1c916b6f40540912
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file 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 downloading and executing a second-stage payload, as is common in PDF-based malware delivery. No specific family could be identified from the available evidence.

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
67407be0ba9c6cf2d06cbb88ec7ba6a4121c4868467218f775537d2d74f42aff		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1F2 3605 bytes

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