Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d93d9d45fdc44a…

MALICIOUS

PDF

45.5 KB
MD5: f9ecc22aabe9fce7ed2a542f21b53ea8 SHA-1: 0588c99ea2c1405773fc4917324f1e90fa3e5b0a SHA-256: d4d93d9d45fdc44a45a22fbbf326376f4790a7ce5fbed52ebd8ca45b7a48be87
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While the exact action of the JavaScript is obfuscated, its presence within a PDF, combined with the high ML score and ClamAV detection, points to a likely exploit or downloader. The embedded URLs are not directly indicative of malicious activity but are part of the PDF structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
b6a7d6fbb802c66a01cf71be5ac34fe086b0afef1f5b6a96e7efa0ddbbdb5d50		 pdf-javascript-stream PDF /JS object 12 at offset 0xA207 3986 bytes

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