Malicious PDF — malware analysis report

Static analysis result for SHA-256 746705a90311347c…

MALICIOUS

PDF

19.1 KB
MD5: bc7f8c098de975ce694a5e71ea463cb2 SHA-1: 3221fdaa447214e60f79cae8b7faa3279cc0ec18 SHA-256: 746705a90311347c3b2ef1d52fc9e81d7b33dd006c2c333e028c25d911920d14
116 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The ML classifier also assigned a high probability of maliciousness. The presence of an embedded script payload and an embedded file further supports the conclusion that this document is designed to execute arbitrary code upon opening.

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
3da7550a927dcbcb2f4fbadf7cc6bdf275654edd027bf2a5da07eee24dc02262
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18775 bytes