Malicious PDF — malware analysis report

Static analysis result for SHA-256 9878c22249bb4ce1…

MALICIOUS

PDF

14.2 KB
MD5: bd102edc7592a44be6ebb0a9483e7871 SHA-1: b0e080d760afc0b48683a8dc97d0d05d21749d7d SHA-256: 9878c22249bb4ce18c7fc90d49c0e81d5bac07da056ed38f498d5bf281080a6f
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a PDF document that leverages XFA forms to exploit CVE-2010-0188 in Adobe Reader. The XFA numeric character-table evaluation stager indicates a technique to execute arbitrary code. The embedded URL, while seemingly benign, is part of the exploit chain. 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.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
  • 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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