Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4a967e13109120…

MALICIOUS

PDF

12.1 KB
MD5: d1a5ced4eb726bb99f65bbcae0a025e8 SHA-1: 5a64a3797bb81afd9496f4a24e05dd48dc7fd49e SHA-256: fb4a967e131091202528a8cb7272f07bd2f71ada9ab6f4c543bd41f2fea38b65
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF contains embedded script payloads and is flagged by ML classifiers and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. The embedded file artifact suggests it's designed to drop or execute further malicious content.

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
4bba9337fb3d728a065fa10b42c6e9219b069767ed89906749b14d61a7821d7b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11630 bytes

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