Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab7faf1232d7a6a…

MALICIOUS

PDF

12.0 KB
MD5: 25d6e4223676e8e5dbf55f14e6bdb5c3 SHA-1: 97d34f9d3df8dc4250e60dee5010e428348d25a7 SHA-256: aab7faf1232d7a6ae265fcf28da10bb73f990cd900ade5a91e72af14032ee861
128 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and an ML classifier. The presence of an embedded script payload and XFA form suggests an exploit attempt. While no specific family is identified, the PDF structure and embedded content point to a common exploit delivery pattern.

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
517093f959b5d51b19c60205d8a0804a9663ad6d210dc2af29e05dbe9f1b8430
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11480 bytes