Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1855ad427829431…

MALICIOUS

PDF

20.1 KB
MD5: 6d7ab7a79aede0f85e84f95850525e19 SHA-1: d11497f70c8871ab694768f92703031ae35df5a6 SHA-256: b1855ad42782943144c6d5b7860124e02a6dc533c3ce5e78d718adebb26c867a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' strongly indicates this PDF is malicious. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF is designed to exploit vulnerabilities and drop a secondary payload. The exact nature of the exploit and payload is not fully discernible from the provided heuristics and limited document body content.

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
087f7865e057dbf1fefbbf92210d258633448a14abc2f865c29cee60d655ba51
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19841 bytes