Malicious PDF — malware analysis report

Static analysis result for SHA-256 4404b8e9812666e5…

MALICIOUS

PDF

32.3 KB
MD5: 85cd72a6f2500524f2d69d9d3a2d39a3 SHA-1: 893fae05c4a6644c50129fe259b37c4577bc421f SHA-256: 4404b8e9812666e58ac793887886953c6bfe98b77af0d38986580b40b93dbb34
148 Risk Score

Malware Insights

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

The PDF file contains an XFA form with executable script, identified as a numeric evaluation stager. This type of stager is commonly used to download and execute a second-stage payload. The ClamAV detection 'Pdf.Exploit.Dropped-92' further supports the malicious nature of the file. The embedded URL, while seemingly benign, is part of the XFA structure and could be used in conjunction with the exploit.

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: Pdf.Exploit.Dropped-92 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-92
  • 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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