Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7a692c9cd19754…

MALICIOUS

PDF

11.9 KB
MD5: 1d256009cd40884fb977e07ea1edff71 SHA-1: 87e23f3d9f70e37bd5d4e85249ca29b1382f54f4 SHA-256: cf7a692c9cd19754fe15abc9ed6759ce340b4d386d4003f25af3e3662e37ec7f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection and high ML classifier score strongly indicate malicious intent. The PDF contains an embedded script payload, suggesting it's designed to exploit vulnerabilities upon opening. The embedded file artifact further supports the payload delivery mechanism. The specific exploit and family are not identifiable from the provided evidence.

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 script payload in PDF stream medium 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 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 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
9c68b987bf83ddcf1601d3dee15b6b41daad9a79abdcdd94c90447b136d442aa
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11384 bytes