Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0d3b3e348fcf50…

MALICIOUS

PDF

11.7 KB
MD5: 56297c276dc946d3246759d897643ccf SHA-1: c8559dc18873948715770c6332563a2b91206809 SHA-256: 5b0d3b3e348fcf50af512b41d1314db1dfe19bc1d0524d32092b59ff915cb205
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, indicating exploitation. The presence of an embedded script payload and an embedded file suggests the document is designed to deliver a secondary malicious payload. The embedded URLs are confirmed benign, and no document body text was available for further analysis.

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 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 script payload in PDF stream low 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 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
f7fac865728c12296645b76aee7652f3d195a0ece3d73cce2ae8af1f392bd850
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11249 bytes