PDF malware analysis — malicious · 5c1f4230c60b8ef0

MALICIOUS

PDF

32.2 KB

MD5: 86cea18571e1dcd08021db685f3ae561 SHA-1: e33a9de4fbe742cffb30e3d00a802d86586e8d1d SHA-256: 5c1f4230c60b8ef04c0e650d9e151267e9136d77ce6e13ce65222c1188d05692

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains XFA forms with executable JavaScript, identified by multiple high-severity heuristics and ClamAV detection. The XFA numeric stager suggests a chain of execution designed to download and run additional malware. The embedded URL, while seemingly benign, is part of the XFA structure and may be used in the exploitation chain.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF 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.
ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-30
XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER

PDF 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.
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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