Malicious PDF — malware analysis report

Static analysis result for SHA-256 8733072e1f0d0800…

MALICIOUS

PDF

28.2 KB
MD5: 6d36dc05184f7e55bcaf7a5f4622405a SHA-1: 9fca920d817cc40ed74e14a2d61353811df5b7fd SHA-256: 8733072e1f0d080044215897ecffc27bacb8e1c076617758c8edbb6a25d1b3b0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, indicating it contains malicious JavaScript. The presence of XFA form elements and embedded URLs suggests an attempt to exploit PDF viewer vulnerabilities for client execution. The embedded URL is likely used to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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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