Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b085168bb9f594…

MALICIOUS

PDF

12.1 KB
MD5: b8ef08dd916330d9ac915632c5fd4f83 SHA-1: 6e44f4380ef8d3db972e1e8131251cd29908aa14 SHA-256: d0b085168bb9f594114e2db2574b031c505dbf671386a47fc9b1a2f73af57d8e
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, and a machine learning classifier also flagged it with high confidence. Heuristics indicate the presence of an embedded script payload within a PDF stream, suggesting the document is designed to exploit a vulnerability and deliver a secondary malicious component. The embedded file artifact further supports this delivery mechanism.

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
0cf1f2b7e470cef1a090708e23565ea64e6d69f0a44d5ee517d5df11d24b026f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11607 bytes