Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d5cc6853344652…

MALICIOUS

PDF

11.8 KB
MD5: 89993da56686c94bbd41318b79ecfbbb SHA-1: 9759d20569b9399a3631c17bde80e1ac66ae569c SHA-256: a6d5cc685334465264dbc567bdbcaab664be50a57ef283f8b7b87f08b28db104
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' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate that this PDF contains and executes an embedded script. The embedded script is likely responsible for downloading and executing a second-stage payload, as suggested by the presence of embedded files and URLs within the document. The XFA form structure also points towards a potential exploit vector.

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
2eb90fff33587cbf2180c65b6ed16dcad86c7e823c6378dd797775594d3f4b52
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11331 bytes