Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22087a175252f1c…

MALICIOUS

PDF

31.8 KB
MD5: 318102618063fc1892ad5539f8a284bc SHA-1: e253ecee67ce9550b4debdf0acd2a3853980c825 SHA-256: b22087a175252f1ceec9e7fb16441d964221974e3b5f7ce6eedd97fe4c9e97a5
178 Risk Score

Malware Insights

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

This PDF file contains a high-risk XFA form with executable script, identified by ClamAV as Js.Exploit.HTML-30. The presence of an XFA numeric stager suggests an attempt to evaluate and execute code. The embedded URL, while seemingly benign, is part of the exploit chain. The primary attack vector appears to be leveraging XFA vulnerabilities to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/

Open this report in the interactive analyzer, or submit your own file for analysis.