Malicious PDF — malware analysis report

Static analysis result for SHA-256 5742bf6296dd2b50…

MALICIOUS

PDF

19.3 KB
MD5: 5d5a987d9a540893a8b1643fdf4b07fc SHA-1: 033676e31c01858277eecdd29a20fa5c11f48c62 SHA-256: 5742bf6296dd2b506fb721b3635244bb45fba08cfa1220a3b8f36f0eb68f04b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this file as Pdf.Exploit.Dropped-78, suggesting it's a known exploit. The embedded file artifact, 'embedded_file_obj0008.bin', is likely the delivered payload. The XFA form and embedded file heuristics further support the malicious nature of the PDF.

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
b86f560aff6ff33873eaf89105bad3937d5389263f592af117a5f8ef783a1e05
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18970 bytes