MALICIOUS
178
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF was flagged by multiple high-severity heuristics, including PDF_XFA_SCRIPT and PDF_XFA_NUMERIC_EVAL_STAGER, indicating the presence of executable script within an XFA form. ClamAV also detected it as Js.Exploit.HTML-30. The embedded URL, while not directly malicious in reputation, is part of the XFA structure. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be exploiting vulnerabilities through the XFA scripting engine.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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XFA form contains risky executable script high PDF_XFA_SCRIPTPDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
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ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTIONClamAV detected this file as malware: Js.Exploit.HTML-30
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XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGERPDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
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Embedded URL info EMBEDDED_URLOne 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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