Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a2cbf0d4b3b93a…

MALICIOUS

PDF

32.2 KB
MD5: e4cbc9a2fb30876609a76c4f11fe2d5d SHA-1: ef014fb6232c7c3d8aa21f8835a70a8f96f63864 SHA-256: 35a2cbf0d4b3b93a8da5848222a63a5bfc8d0a650dc52a3ff3b81044391c1600
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution

The PDF file contains a high-severity XFA form with executable script, identified as a numeric evaluation stager. This stager is designed to download and execute a second-stage payload. ClamAV detection as 'Pdf.Exploit.Dropped-92' further confirms its malicious nature. The embedded URL is likely part of the exploit 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: Pdf.Exploit.Dropped-92 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-92
  • 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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