Malicious PDF — malware analysis report

Static analysis result for SHA-256 25616681e4d0fa8f…

MALICIOUS

PDF

11.7 KB
MD5: 721e9fcac78ec75e8f6c12a8cc33fcc8 SHA-1: 94c5bbf56e3bd79d036dd5479536c753c20871c4 SHA-256: 25616681e4d0fa8fc1d2b85a17d01de4470bb351c0131c3ab5db85215a2dc5cf
96 Risk Score

Malware Insights

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

The PDF contains embedded content and a script payload, as indicated by the PDF_EMBEDDED and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detected this as Pdf.Exploit.Dropped-78, suggesting it's designed to drop further malicious content. The embedded file artifact is likely the delivered payload.

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
add77405311d3b3a1a849bce4f432e30783fe41edc7ac737e507f05b0e0d7fd3		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11212 bytes

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