Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c1eb9eefa89a2a…

MALICIOUS

PDF

14.4 KB
MD5: 4e8903a4d6741383741987871521cb57 SHA-1: 7f09baf78da30c12f31f91a26b54fc54a5186cf9 SHA-256: 89c1eb9eefa89a2a3a84e3c45136583852c90c269805ce42c0dbd100959fbf85
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 the CVE-2010-0188 vulnerability in Adobe Reader, specifically targeting XFA forms. The ClamAV heuristic 'Js.Exploit.HTML-30' suggests embedded JavaScript is used in the exploit chain. The embedded URL is likely part of the exploit delivery or staging process. The primary attack vector appears to be tricking a user into opening a malicious PDF that exploits a known vulnerability.

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/