Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dad91acad7a241d…

MALICIOUS

PDF

11.8 KB
MD5: cd86134785309d6e2feeb4947d985cb0 SHA-1: e2fe84d76fb8abba561813fb2b992b5ad46cfd87 SHA-256: 0dad91acad7a241d355f76f62c80f381f70bd62a07f96db577ce9640bdd52a95
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Phishing: Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and download a secondary payload. The presence of XFA forms and embedded files points towards exploitation techniques commonly used for initial execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
96e78e97ebd5e0d44fc4364843f3b298279725377386af914781b016fb31998d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11323 bytes

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