Malicious PDF — malware analysis report

Static analysis result for SHA-256 6809aeba77d6fcfb…

MALICIOUS

PDF

24.2 KB
MD5: a2e6578d514da47dbd14727bf3de03c4 SHA-1: d377d0f3448be8f1c133e8f5370015b0daf65d5b SHA-256: 6809aeba77d6fcfba7542995e64fd18e9a29e693edd5c242dc3d6f244e69ac96
162 Risk Score

Malware Insights

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

The sample is a PDF file that leverages the XFA form functionality to exploit CVE-2010-0188 in Adobe Reader, allowing for arbitrary code execution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL, while seemingly benign, is part of the XFA structure and could potentially be used in conjunction with the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/