Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b34a3aa29883b4b…

MALICIOUS

PDF

24.7 KB
MD5: 7111fa95f5641469a8af1de22436d96a SHA-1: 700d2484dec7b58048374d5d846fad2cef34de18 SHA-256: 9b34a3aa29883b4b309d85a5c98c331c361bda6124bb52385ab52eef09aba60c
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1204.002 Malicious JavaScript

The PDF file contains XFA forms with executable scripts, as indicated by the PDF_XFA_SCRIPT and PDF_XFA_NUMERIC_EVAL_STAGER heuristics. ClamAV also detected it as Js.Exploit.HTML-30. The embedded URL is likely part of the exploitation chain. The exact intent of the script is not fully discernible due to its nature as a stager, but it is designed to execute malicious code.

Heuristics 5

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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/