Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4cf2b8d1c18c3b…

MALICIOUS

PDF

20.2 KB
MD5: d83467fce0d7566c60fb83580026a082 SHA-1: 24dd57609b61ae1b5f1ccad28c617c164132b4c2 SHA-256: 6c4cf2b8d1c18c3bb96abe04bebc59dbcd2d1b1f23a28c18de04684e9b9d14ca
162 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics, including a critical finding for CVE-2010-0188, an Adobe Reader LibTIFF XFA exploit. This indicates the file is designed to exploit a known vulnerability for client-side execution. The presence of an embedded URL, though seemingly benign, is noted as part of the PDF structure. The ML classifier and ClamAV detection further confirm its malicious nature, suggesting it's a dropper or exploit loader.

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-36826 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36826
  • 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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