Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef188ed0bd54b00…

MALICIOUS

PDF

32.1 KB
MD5: 8cc057e103f52596d7c4fbae35ecab47 SHA-1: 205fb56a45ef4f2e8bae02ab83bae7bb878f5ffe SHA-256: 1ef188ed0bd54b00547cab29b1e222ca494ee59604b7c5c68b8d4ea328476a4b
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable scripts, identified as a stager for numeric evaluation. ClamAV detected this as Js.Exploit.HTML-30, indicating a JavaScript exploit. The embedded URL is likely used to fetch and execute a secondary payload. The presence of XFA scripting and the ClamAV detection strongly suggest an exploit delivery mechanism.

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/