Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dd45b1163d985e…

MALICIOUS

PDF

19.4 KB
MD5: 3954e5e8ecaa533df18d7899d0012dcc SHA-1: 5214c1909bd376d7ffbaa7295bb5476ee8ee6fd2 SHA-256: 22dd45b1163d985e673fd27ca7dc2d009bc301cd0122947c8f54ce052eb2aa69
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML score. The presence of an embedded script payload and an embedded file indicates a clear intent to exploit vulnerabilities and deliver a secondary payload. The document body content is obfuscated and does not provide further clues about the 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
d3e8e76938dfc75cb0a8dde85292de5a8550516d6b8b7b630b535efd195c9130
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19063 bytes