Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c07808fb4eab33…

MALICIOUS

PDF

14.4 KB
MD5: 3f8bafc3ee8054f267a0a34ecb554c08 SHA-1: c850506e047da94f9f5e5efbd5c593c9f6d46920 SHA-256: 23c07808fb4eab33c9e87d4775bfa811daf21e181f9b3f0ad506989ea0c8c7de
168 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV (Pdf.Exploit.Dropped-78). Static analysis detected critical heuristics indicating an exploit for CVE-2010-0188, specifically targeting XFA forms within Adobe Reader. The presence of an embedded URL, although benign in this case, is consistent with the delivery mechanism for such exploits. The XFA numeric eval stager further supports the exploitation vector.

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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