Malicious PDF — malware analysis report

Static analysis result for SHA-256 26926a8ef88e23a5…

MALICIOUS

PDF

11.7 KB
MD5: 332b5fc7f0a711b93ce3a7cd1b42d6db SHA-1: 5811606e29130f431997e7f847c71fac79ca64ab SHA-256: 26926a8ef88e23a5f29a32a1008dbe20ac63e0b65f4f5d103c722759a9a3d21f
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier with high confidence and detected by ClamAV as Pdf.Exploit.Dropped-78. It contains an embedded script payload and an embedded file, indicating it is designed to deliver a secondary malicious component. The presence of XFA form elements also suggests a potential attack vector.

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
eba15efea0ec20b9ad3c1536b49771bb6e5238692b27df23839f7c3b9d299d45
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11190 bytes