Malicious PDF — malware analysis report

Static analysis result for SHA-256 595400cd4969c483…

MALICIOUS

PDF

12.0 KB
MD5: 24410223213e63abd09cb51c4c8fc6c2 SHA-1: 6b1baadf1f1b9d39ee9cb1ac89231e8795f8b25b SHA-256: 595400cd4969c483fd8aed8726916495fbf72ab700404c55ba3eafea4dd0d75f
128 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious, specifically flagged as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further supports this assessment. The XFA form structure is also a common vector for PDF exploits. The embedded URLs, while not directly malicious, are part of the document's structure.

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
ef36545cf068b10a43d640d6d03708a7acede322cc7372474467060a06095515
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11482 bytes