Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a2ddf1b8f04f43…

MALICIOUS

PDF

24.4 KB
MD5: 7392706be2be8d6097fd5498a4d11009 SHA-1: 457a19c8cb5f80d8cde79c8bfd6f8bafb2143d4e SHA-256: 51a2ddf1b8f04f4353c1f37bf92e03179b6ac5489a37658659e0aeef5b6f54a0
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 document that leverages an XFA form to exploit CVE-2010-0188, a known vulnerability in Adobe Reader. The heuristic firings indicate the presence of an XFA form and a decoded XFA payload matching the exploit. The embedded URL, while seemingly benign, is part of the XFA structure and likely related to the exploit delivery mechanism. The ClamAV detection further confirms its malicious nature.

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/