Malicious PDF — malware analysis report

Static analysis result for SHA-256 da64f9178f6865ca…

MALICIOUS

PDF

12.2 KB
MD5: bb4692e2092a5733a2e034203e3c67f0 SHA-1: 6d355eb4385fd51d61ed2c66e4993336b32c3481 SHA-256: da64f9178f6865ca3e80109538127fd3019193387b38e7430b8352d0d7b79114
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains an exploit. The presence of an embedded script payload and an embedded file further supports this. While the specific script content is obfuscated, the overall structure suggests it's designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
39fbe044161162269fc93b3513cd472d759e50c786b2c65a94786ad34b961682
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11706 bytes