Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e28b9acbed6742…

MALICIOUS

PDF

18.8 KB
MD5: 0dfda6bee36368b0226951534802b15f SHA-1: 40a517b720b3bff2c445c80679e8f2033e28b3bd SHA-256: 29e28b9acbed67420d72cac3fe3a17760507eb50a18727da4ae8f29250c1b30b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The 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 further indicates malicious intent. The file likely exploits a vulnerability to download and execute a second-stage payload.

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
a3c3422231c77e4a6f639773f267844926fcb5e07004e529aa521793e1c073d2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18538 bytes