Malicious PDF — malware analysis report

Static analysis result for SHA-256 466609fcd5f05e9b…

MALICIOUS

PDF

12.2 KB
MD5: 6a3fffa2404cf73592f48047e9e740d2 SHA-1: b1ae45bc0fc5b2ddc75a7199d75db47f339e7848 SHA-256: 466609fcd5f05e9bb1702ef0450408e8fca5e264efe004544ad17a1bd9b44f76
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains an embedded script designed to exploit vulnerabilities. The presence of XFA forms and embedded files further supports this. The script's exact function is not fully discernible due to obfuscation, but it is highly likely to download and execute a second-stage payload.

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
d4c60f4f234c79b2a91a0acbb18ce9bcd02dbbdbd456dc7b6bd072b9c56ea5e1
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11715 bytes