Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf9f22955c28074…

MALICIOUS

PDF

11.9 KB
MD5: 57009d4171418a940fa8168075e494a6 SHA-1: 24fc9e5c8bf690eaeb495f6189a4102c7b903f25 SHA-256: 7cf9f22955c280740842a9e2a1376387bdcddbf55c3f6e4357c7fef311007aa2
96 Risk Score

Malware Insights

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

The PDF file contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this as Pdf.Exploit.Dropped-78, suggesting it's designed to exploit vulnerabilities. The embedded script likely serves as a payload delivery mechanism, although its exact function is obscured by obfuscation. The presence of XFA forms and embedded files further supports its malicious nature.

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
f5c64a10fe807bb507e8aba8c021e76d3f7907eaaa49dcef0d82814e02e8a379
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11448 bytes