Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb138d5935d73183…

MALICIOUS

PDF

426.5 KB Created: 2010-11-29 10:29:36 Authoring application: FPDF 1.6
MD5: 1b4dc9c28579eae0881b5f64cdb433be SHA-1: 36b8ea0e48612e26f6d2cd6ec9cbf6ccc17b2467 SHA-256: eb138d5935d73183f83e9101789f16abf218f713918404e1567357cde45147ea
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. The presence of JavaScript actions and streams suggests an attempt to execute code, likely to download and run a second-stage payload. The specific URLs extracted are related to XFA forms, but their reputation is unknown or benign, suggesting the malicious payload is likely delivered through other means not directly visible in the provided evidence.

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/