Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3ac91cf0dce2ed…

MALICIOUS

PDF

47.0 KB
MD5: ac66030bd67402c835fe60e1fa785ee7 SHA-1: 6aa41b7e997129419550d8430a08a73d7a8dc387 SHA-256: da3ac91cf0dce2ed24225e7978a539ccd6ba98743ac1fbece6ef9ecbcee341da
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically identifying it as Pdf.Exploit.Dropped-78. The presence of an XFA form is a known technique for exploiting vulnerabilities in PDF readers. An embedded URL was also found, likely used to download a secondary payload. The exact exploit mechanism is not detailed, but the combination of XFA and an embedded URL strongly suggests a malicious dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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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