Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ab6e2d8dc1f021…

MALICIOUS

PDF

45.2 KB
MD5: 15862b037b500fc31de88fa0edb9f70d SHA-1: 2b460d54ff3a3f0a50c824c3a52c773b6201deb8 SHA-256: 32ab6e2d8dc1f021575671f27ced94dfe87c04c2fd6f73b9ac5ffe3d89817fb3
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics as containing obfuscated JavaScript and was classified as malicious by an ML model. ClamAV also detected it as Heuristics.PDF.ObfuscatedNameObject. The embedded JavaScript is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The presence of XFA form elements and embedded URLs, though benign or unknown in reputation, are common in PDF-based attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9401

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
ad1a39b1e5b5ba37235682249d739d1b5b620a5067675f78d5cfc5fd1d1d1435		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1DD 3789 bytes

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