Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9471be4b9dd4c0…

MALICIOUS

PDF

14.3 KB
MD5: 33d544d8c547c123d353296a7f240507 SHA-1: 7b03bbe310a502c914c76178445d027299246e07 SHA-256: 4c9471be4b9dd4c091c770b3289eca2a7ce697debee6acff9a9c8167d5d6190c
168 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment

The sample is a PDF file that leverages XFA (XML Forms Architecture) to trigger the CVE-2010-0188 exploit, targeting Adobe Reader. The heuristic firings indicate a critical exploit for CVE-2010-0188 and an XFA numeric stager, suggesting the PDF is designed to download and execute a second-stage payload. ClamAV also detected it as Js.Exploit.HTML-30, further confirming its malicious nature. The embedded URL is likely related to the XFA template but does not appear to be the direct download source.

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: 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
  • 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/