MALICIOUS
178
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF file contains an XFA form with embedded JavaScript, flagged by multiple high-severity heuristics including 'PDF_XFA_SCRIPT' and 'PDF_XFA_NUMERIC_EVAL_STAGER'. ClamAV also detected it as 'Js.Exploit.HTML-30'. The embedded script likely attempts to download and execute a second-stage payload, indicated by the numeric evaluation stager and the ML classifier's high confidence. The embedded URL is likely part of the exploit chain.
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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