Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad1cfa11d943bca…

MALICIOUS

PDF

31.8 KB
MD5: 4fec112d2600f784d62fec83394e65d0 SHA-1: 29c0c96a21d3814635589ab71ddb876bed8bbc60 SHA-256: 9ad1cfa11d943bca3e9a6488c8f1726faea2dfab26ff80112364921bbde72954
70 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is a PDF document identified as malicious by ClamAV with the signature Js.Exploit.HTML-30. It utilizes XFA forms, which are known to be exploited to execute embedded JavaScript. The embedded URL, while seemingly benign, is part of the XFA structure. The primary attack vector appears to be the execution of malicious JavaScript within the XFA form, likely to download and execute a second-stage payload.

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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