Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd79a94c67c07970…

MALICIOUS

PDF

63.8 KB Created: 2010-11-13 13:52:29
MD5: 31302ec5bd5961b0a807ec6b1b6bac96 SHA-1: 3924c9ed10368e241de1af78351b09b15c76eed5 SHA-256: fd79a94c67c07970a069d36d0c977573c316d188320d9504c389743887597bac
74 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and utilizes an XFA form, both flagged as suspicious. The ML classifier strongly indicates maliciousness. The presence of JavaScript actions and embedded JS streams suggests the document is designed to execute arbitrary code, likely to download and run a second-stage payload. The specific URLs extracted are related to XFA schemas but do not directly indicate the payload source.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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/