Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f845d5577519f49…

MALICIOUS

PDF

12.1 KB
MD5: cef620bed9478c682328518040145ebd SHA-1: d6517ca2f075bcdcc7095d2e682d1e7df614a19c SHA-256: 7f845d5577519f491fd27e20859653b277515b97d2cee3298fe5937c88c6ed19
116 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, and a high ML score. It contains embedded script content and an embedded file, indicating it's designed to exploit vulnerabilities and deliver a secondary payload. The benign URLs present are likely decoys or standard PDF schema references.

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
fe67dba2a77a6e546aecabeb7e8821f1dff250f5d827558ac4d7897eb3d44137
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11609 bytes