Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05114e347ee74f6…

MALICIOUS

PDF

33.0 KB Created: 2010-11-29 10:29:36
MD5: b8a8eefad0ad584c4de9f336993d539b SHA-1: 4ddc760654132a530cf7715feb3d3495205e60c1 SHA-256: b05114e347ee74f6624817ab58b817c7e2f86f5924cf1b16da81065f47f255a3
74 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier also flagged this PDF as malicious with high confidence. The presence of JavaScript actions and streams, along with the 'PDF_FILTER_HEX' filter, suggests an attempt to obfuscate and execute malicious code. The likely intent is to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/