Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afc187006ae77d2…

MALICIOUS

PDF

14.3 KB
MD5: f72b5f8134dde16c70470e652f61432e SHA-1: 20dd9ef3e7fb2820b273abec0b3738c273a0f999 SHA-256: 4afc187006ae77d291aa7de48daec74133de204c0d2f61dbe241ab595c03e654
168 Risk Score

Malware Insights

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

The file is a PDF document that leverages XFA forms and exploits CVE-2010-0188, a known vulnerability in Adobe Reader. The presence of XFA form elements and a numeric evaluation stager strongly suggests an exploit attempt. ClamAV also detected this as Js.Exploit.HTML-30, indicating embedded JavaScript likely used for the exploit. The embedded URL is likely related to the exploit delivery mechanism.

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/