Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbfa74eef1e4408…

MALICIOUS

PDF

32.2 KB
MD5: 3da19ea5d870d3525322cbad47aecc4f SHA-1: 8662779d9aa62abd66b36af7f3cad85be1d2de15 SHA-256: 1bbfa74eef1e4408e50026b96fefc46f65b00fa4d0ec6deefc2b76effcad9297
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable script, identified as a stager by heuristics. ClamAV detection as Js.Exploit.HTML-30 further confirms malicious intent. The embedded URL is likely part of the exploit chain, though its exact role is unclear without further analysis. The script's primary function appears to be downloading and executing a second-stage payload.

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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