Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28a499df301a4bf…

MALICIOUS

PDF

11.8 KB
MD5: 4a0651026738a43e2194edeb72911a65 SHA-1: 9c0bcb464a52ea77e9dd2ac33af42461e124ccf7 SHA-256: e28a499df301a4bfe1ee780f20c3498b021af8fd1fb4ef2ebdf1b422a5f68ad3
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' strongly indicates this PDF exploits a known vulnerability. The presence of an embedded script payload and an embedded file further supports this, suggesting the PDF is a dropper for a secondary malicious payload. The document body contains no user-facing text, indicating its purpose is purely to facilitate the exploit.

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
1e54cdcb9289ccfbf81e6d3bb4bd172018e2065057f8cc6693c6711dc917295f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11335 bytes