Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3428f85f8ec9db6…

MALICIOUS

PDF

24.1 KB
MD5: b079a701ee31c508be0cd998aa4fafa1 SHA-1: 6f72c6fd93ff710759596a441b1a7b2db251bdc7 SHA-256: b3428f85f8ec9db695f6ddd80c64e6037f6f1ccbd64b084854e46ca9b1bc2042
128 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file that contains an XFA form, which is a known vector for exploiting Adobe Reader vulnerabilities. Specifically, the critical heuristic firing indicates exploitation of CVE-2010-0188, a vulnerability in LibTIFF used by Adobe Reader. This exploit likely downloads and executes a second-stage payload. The embedded URL, while seemingly benign, is part of the exploit structure.

Heuristics 4

  • 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
  • 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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