Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52fdb5e55750791…

MALICIOUS

PDF

32.0 KB
MD5: 2fe8258aec852c88c4d669bdc54e2510 SHA-1: 571c6fe24efa124e257d8fbbc9cfd466a2930cea SHA-256: c52fdb5e55750791fb2082e2677710a5244295e0d94658cbbffa26162ce3aa3c
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for Js.Exploit.HTML-30, indicating it contains malicious JavaScript. The ML classifier also strongly indicated maliciousness. The embedded URL, while not directly executable, is associated with XFA forms, which are known to be exploited. The JavaScript, though obfuscated, is the primary mechanism for exploitation, likely leading to the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • 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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