Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae3c7a8898a7f59…

MALICIOUS

PDF

11.8 KB
MD5: 7c5e8bd38d7d75d3540c4a23b7d2bf59 SHA-1: 75e555398356b64b223d1ae5caa8c1f75b32a47a SHA-256: 3ae3c7a8898a7f593b9c40efff441b695d2b4357b44a4e59ba196a2b58676657
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 and an embedded file, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_EMBEDDED heuristics. ClamAV detection as Pdf.Exploit.Dropped-78 further confirms its malicious nature. The embedded file, 'embedded_file_obj0008.bin', is likely the delivered payload. The XFA form structure suggests a potential exploit targeting PDF reader vulnerabilities.

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
e62712a7023299721195891ee167fca9b65d121468f983224dc952c5bad83822
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes