PDF malware analysis — malicious · 5ed9d99c9928d3eb

MALICIOUS

PDF

32.2 KB

MD5: 4555a6d8bcaafc8963d2a585a19e43cc SHA-1: 0f731d26628f405c88e4b68604c48f7927f78190 SHA-256: 5ed9d99c9928d3eb634496feb7520744f4708a6d105e948dd1cb52a7ce5e5c38

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a high-severity XFA form with executable script, identified by ClamAV as Js.Exploit.HTML-30. The script likely acts as a stager, evaluating numeric expressions to download and execute a second-stage payload. The embedded URL is likely related to the XFA template, but the primary malicious activity stems from the script execution.

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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