Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa89c61980ffef0…

MALICIOUS

PDF

11.7 KB
MD5: 134f31abc2e1450c49fad6f9c139a3c3 SHA-1: 500658349120f47b963c0a39407766192949e23d SHA-256: 8fa89c61980ffef0a6d02a9994a92bf9ce37a68eb1962547b7f936b83f1464d3
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML score indicating maliciousness. The presence of an embedded script payload and an embedded file suggests the document is a dropper or exploit container. The XFA form suggests a potential avenue for exploitation.

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
a878344ee85599ac9519659260f9b97fe1408a2d07f25b7dcc67418398692dbb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11200 bytes