Malicious PDF — malware analysis report

Static analysis result for SHA-256 074325eb33aebf01…

MALICIOUS

PDF

12.1 KB
MD5: 6a3754236d60546a447ccd88d355a901 SHA-1: 0834bb986322d33bb7be49feb574b71085c77445 SHA-256: 074325eb33aebf01ce948d53b605b64885bdb0f167eec37fac6b29b11509ce35
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded script content and is flagged by ML classifiers and ClamAV as malicious, specifically as an exploit that drops a payload. The embedded file artifact further supports the payload delivery. The benign URLs present do not detract from the malicious nature indicated by the heuristics and embedded artifact.

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 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 script payload in PDF stream low 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 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
31b66cd08ae1ed68d992d248f52907db76d945e4ec351a8d9e16aded504f03e2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11625 bytes