Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad5fa6cb7037c16…

MALICIOUS

PDF

24.2 KB
MD5: d16ffc2a6d98a966f65d950a271d32a9 SHA-1: 1317e210c3ebb0f958498e0c85b372db26b7d0db SHA-256: fad5fa6cb7037c16b80ad78cf0170d05c23afd9a311c27a29f19df3d9482f4e4
130 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File

The sample is a PDF file that leverages XFA forms to exploit CVE-2010-0188, a known vulnerability in Adobe Reader. The heuristic firings and ClamAV detection strongly indicate malicious intent, likely to download and execute a secondary payload. The embedded URL, though seemingly benign, is part of the exploit mechanism.

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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