Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b37586228f905c9…

MALICIOUS

PDF

24.6 KB
MD5: 4041a96131803e98c050e8795844456f SHA-1: aad0a294b2b2c9e7a775afbf21e60d26faeb44f2 SHA-256: 1b37586228f905c99438ce6bbad6d9e27a776fd4c5595a66dc6b998ad25688f3
148 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious JavaScript

The PDF file contains an XFA form with executable script, identified as a numeric evaluation stager. This stager is likely designed to download and execute a second-stage payload, as indicated by the ClamAV detection of Js.Exploit.HTML-30. The embedded URL, while not directly executable, points to a schema related to XFA templates, further supporting the attack vector.

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/

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