Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59373728f9eaad4…

MALICIOUS

PDF

19.4 KB
MD5: e1738fb265d40000ec7b29d19b7a67fc SHA-1: f17866d5ed64279ef68cb8340c7d86a9c189d690 SHA-256: e59373728f9eaad4940dfa6298e011fa505c10f0d212c15276b8c23a4ee63b31
128 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded script payload and an embedded file, indicating it's designed to deliver a secondary malicious component. The XFA form and embedded script suggest a potential exploit targeting PDF viewers. The embedded file artifact is likely the delivered 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
2d0205f2569f2bc604bd635f7c0dcde3d3af252c5e462b0557ccc6c672106a3f
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19113 bytes