Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4661cc91fa2169…

MALICIOUS

PDF

11.9 KB
MD5: 7af98c29b08fbbd74b736f46de829af6 SHA-1: d0c4c3d70186b3ab0a61640524811789ae6816dc SHA-256: 7b4661cc91fa21692b55f0bf212bc5c711ce89dc043669ea94cc6d4bcdc56cc6
96 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic indicate the presence of malicious code within the PDF. The PDF also contains embedded files and XFA form elements, which are sometimes used to hide exploits. No specific script content was readable, making it difficult to determine the exact payload or delivery mechanism.

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
08b37a0225a4b4f99af8e06f86919aa43043d9bd000843b12697635c02349bc6
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11397 bytes