Malicious PDF — malware analysis report

Static analysis result for SHA-256 918f71d8b4cc0564…

MALICIOUS

PDF

31.9 KB
MD5: 5875cf530b1447881d93cd40b6e2c61d SHA-1: 9018de14bb86e522ab488b63a14811b0db96a892 SHA-256: 918f71d8b4cc056448722463c9c375114a8e803fb433525e418d77011ae4b816
148 Risk Score

Malware Insights

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

The PDF file contains XFA (XML Forms Architecture) forms, which are known to be used for embedding executable scripts. Heuristics indicate the presence of risky executable script within the XFA form and a numeric evaluation stager, suggesting an attempt to exploit vulnerabilities or download a secondary payload. ClamAV detection of 'Js.Exploit.HTML-30' further confirms malicious intent. The embedded URL is likely part of the exploitation chain.

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/