Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff16cb87c46f70d…

MALICIOUS

PDF

18.9 KB
MD5: b9d1a07d60dd433087330d428d21fce0 SHA-1: 3c08daec53afc8b8e49c80d0d93500e928d61229 SHA-256: 2ff16cb87c46f70de42566fafdeacc97ed7d6be95ae9b5ca7b79446b2c080c8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit vulnerabilities and deliver a secondary payload. The document body content is not indicative of a specific lure.

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
8e5ce151e5809f3f7ebe407813d1e589fd06ed2570c56144ff62da718328efd2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18585 bytes