Malicious PDF — malware analysis report

Static analysis result for SHA-256 6140c3372233d359…

MALICIOUS

PDF

19.3 KB
MD5: c455f369c45f367952f2f2286891f467 SHA-1: 025beae15c45479d575244f12eb878c9d49e95f2 SHA-256: 6140c3372233d359eb649be39b17ef8f8ad7e752c681ec6a9c63358484ab4afe
116 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by multiple engines, including ClamAV with the signature 'Pdf.Exploit.Dropped-78'. Heuristics indicate the presence of embedded files and scripts, suggesting it's designed to exploit a vulnerability and execute a secondary payload. The ML classifier also strongly indicates maliciousness.

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
0728a67a9583c0c6e44dea8e5774211c5c813d61043c3686a2e2c66a80d077e2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19005 bytes