Malicious PDF — malware analysis report

Static analysis result for SHA-256 58959b39dcaaca4d…

MALICIOUS

PDF

24.2 KB
MD5: 5d68c48d18d20bb5f793b99aca06e55f SHA-1: 5f5bf9b14149e56aa9794ad9cb6929ab4f37b3ee SHA-256: 58959b39dcaaca4d18d5985a78c6b54780ed69e8b357d38217c8b9c3d1c4cdc9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The sample is a PDF file that contains XFA form elements, which are known to be targeted by exploits. Heuristics indicate a critical vulnerability (CVE-2010-0188) related to LibTIFF and XFA image exploitation. ClamAV also detected it as malicious. The embedded URL, while seemingly benign, is part of the XFA structure and could be used in conjunction with the exploit.

Heuristics 5

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • ClamAV: Pdf.Exploit.Agent-36821 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36821
  • 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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