Malicious PDF — malware analysis report

Static analysis result for SHA-256 106d9c0e529868ff…

MALICIOUS

PDF

28.0 KB
MD5: 1ca1bb7b732fa71b29709c955952b965 SHA-1: 8633f81cb60899217588fd7210f5e442c81692ac SHA-256: 106d9c0e529868ff5d43c69975b976aa0137598bd2169d56e5b6eae684f80e30
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file identified as malicious by ML classifiers and ClamAV, specifically detected as Js.Exploit.HTML-30. It utilizes XFA forms, which are known to be exploited to execute embedded JavaScript. The JavaScript attempts to construct and evaluate code, likely to download and execute a second-stage payload.

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/

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