Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce263aad57617bea…

MALICIOUS

PDF

28.5 KB
MD5: f498e94e7a951ec5a1e3f6036b9d471c SHA-1: 75a08d401912b3631837d8fce5e739ccefc636e3 SHA-256: ce263aad57617bea55f0b46b92b82f0883f2068842b310ab33ac7e6a9f5bcd1e
100 Risk Score

Malware Insights

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

The PDF file contains an XFA form and triggers a critical ClamAV detection for Js.Exploit.HTML-30. The embedded JavaScript, when decoded, appears to be an attempt to execute malicious code, likely to download and execute a second-stage payload. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely part of the exploit chain.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Js.Exploit.HTML-30 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Js.Exploit.HTML-30
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/