Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89eaea65250fbb5…

MALICIOUS

PDF

19.2 KB
MD5: fc450aad4e9fb38054c0247302f4f8c6 SHA-1: e2f9627a3240853dc2ba75cc33c3a06971d6c2d7 SHA-256: e89eaea65250fbb56eebd4c8dc49e8293cc47259cac9739917a6219d4feb4a0d
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 (Pdf.Exploit.Dropped-78) and a high ML score, indicating malicious intent. The presence of an embedded script payload and an embedded file further supports this. While no specific document body content was readable, the combination of these indicators strongly suggests the PDF is designed to exploit vulnerabilities and drop a secondary 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
f1bb29ca4c605a2f02957e316dccb8fa33e677ef4fe66a52b61d07a30e4f28dc
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18946 bytes