Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b6bd20676047c0…

MALICIOUS

PDF

11.8 KB
MD5: 22d0aca0017429eaa0142fbc0e71e30f SHA-1: 7db072bf35d952c937e80fbc769ac4c4022ec2a2 SHA-256: c0b6bd20676047c08d488c6762131189dfce445491b32b9cc4f15ba0cbca6a13
128 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to drop and execute further malware. The embedded URLs are benign or unknown, and no document body text was available for content analysis.

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
90e2e54958bf0db90b77f12f448773766eab31db20bf5c7c46e0947782651656
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11294 bytes