Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bc6028873ae916…

MALICIOUS

PDF

28.0 KB
MD5: 3ac42bcf7d2956b3d7bb07333ecef7c8 SHA-1: 8358ca21e96d5bf582b7de2159b8e512db21f97c SHA-256: 88bc6028873ae916c43a30f3c0e090f4e1d018a0b51615b74317ce080846f03e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains XFA form elements and embedded JavaScript, which is flagged by multiple heuristics including ClamAV and an ML classifier as malicious. The embedded URL points to an XFA schema, suggesting it might be part of an exploit targeting XFA forms. The JavaScript, though obfuscated, is likely responsible for executing the exploit and downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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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