Malicious PDF — malware analysis report

Static analysis result for SHA-256 81cab20df1ba099f…

MALICIOUS

PDF

28.3 KB
MD5: 533c1ff189fec2fb567de3fa18cad233 SHA-1: 3c954bd2a688fcb1eb362e4b89f0425bbbd2c987 SHA-256: 81cab20df1ba099fb412ff97a4c7294a8df78cee94b3ffa8b0cbf5589b0a0fb5
70 Risk Score

Malware Insights

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

The file is a PDF containing an XFA form, which is a known vector for embedding scripts. ClamAV detected this as Js.Exploit.HTML-30, indicating a JavaScript exploit. The embedded JavaScript, although partially obfuscated, appears to be designed to execute code and potentially download a second-stage payload from the provided URL. The presence of XFA and the JavaScript exploit strongly suggest a malicious intent to compromise the user's system.

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/