Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bfc19b5ebb82ff…

MALICIOUS

PDF

28.4 KB
MD5: c29229682fa56d2f71484b565b9f995e SHA-1: 5db5379e0f1be5f7e7e6cb3ea2c76ac6e7c3f838 SHA-256: 01bfc19b5ebb82ffdcb1a1948c13ff58c166d413f43812f2f74370a8e36c2018
202 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF containing an XFA form, which is known to be a vector for exploits. Heuristics indicate a critical vulnerability (CVE-2010-0188) related to XFA image handling, and a numeric evaluation stager is present. The ML classifier and ClamAV also strongly indicate maliciousness. The embedded URL is likely part of the exploit chain, though its specific role is not detailed.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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-36825 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36825
  • XFA numeric character-table eval stager high PDF_XFA_NUMERIC_EVAL_STAGER
    PDF XFA initialize script reads numeric form data from rawValue, maps the values through a short character table, and evals the reconstructed stage. This is an exploit-kit staging technique even when the final decoded layer remains encoded.
  • 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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