Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9cdcfdf179adc18…

MALICIOUS

PDF

63.8 KB Created: 2010-11-13 13:52:29
MD5: 0558a59717a3ffc716f077831ee2cbe2 SHA-1: 05fa865ac3c719cac647e2a9025f228e2ad44667 SHA-256: f9cdcfdf179adc1853d5395fa480360e66b8eb77e3984cd92729049232eebf92
74 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier also flagged this PDF as malicious with high confidence. While the document body is unreadable, the presence of JavaScript suggests an attempt to download and execute a secondary payload. The specific URLs extracted are related to XFA forms, but their reputation is unknown or benign, so the primary threat likely stems from the obfuscated JavaScript.

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/