Malicious PDF — malware analysis report

Static analysis result for SHA-256 3befd1e7e27863c7…

MALICIOUS

PDF

19.0 KB
MD5: 899b0f6a7a302f037d5a4299f25e783a SHA-1: 320eab462428a099f16d92d92306cc237805b0e1 SHA-256: 3befd1e7e27863c7893bf169419668fe28f1d6acc95c04d87c674c238d560bde
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detection of 'Pdf.Exploit.Dropped-78' strongly suggests this is a known exploit. The embedded file and XFA form heuristics further support the malicious nature of the document. The primary attack vector appears to be leveraging the embedded script to download and execute a secondary payload.

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
ec1f1635e28d47af8e8f6d31803cfe002a20514ab14e9362761b7ffe16158bf3
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18651 bytes