Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c38ef3998fd730…

MALICIOUS

PDF

14.4 KB
MD5: b60966dc493a23c79d1b56697d7b9028 SHA-1: 3740b5542751a984cf1b7e9ff2fb212879f74f1a SHA-256: b5c38ef3998fd7300aa934a8ea4fd698b8fd8e850bbe5d7b1740dd366ed53d3d
170 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains an XFA form that triggers the CVE-2010-0188 exploit in Adobe Reader. ClamAV also detected this as Js.Exploit.HTML-30, indicating a JavaScript-based exploit. The XFA numeric eval stager further confirms the exploit mechanism. The embedded URL is likely related to the XFA schema but is not directly indicative of the payload's destination.

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: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • 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/