Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cef1e150b6a17ef…

MALICIOUS

PDF

28.3 KB
MD5: bcb225115f458b6b55938004299890c0 SHA-1: 352d65b78b7da8f5bc8e8797dec17663e55f6bc2 SHA-256: 4cef1e150b6a17efc7535fd35f9d1226a8aa100ee3c3e124b211ce119f791fe7
98 Risk Score

Malware Insights

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

The PDF file contains XFA form elements and is flagged by a machine learning classifier and ClamAV as malicious, specifically detecting Js.Exploit.HTML-30. The embedded URL, http://www.xfa.org/schema/xfa-template/2.5/, is likely part of the exploit chain. The obfuscated JavaScript within the document body suggests an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • 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://www.xfa.org/schema/xfa-template/2.5/

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