Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd204ed5902aef1c…

MALICIOUS

PDF

19.4 KB
MD5: 09e91df9402cc5150488d1d94145db7d SHA-1: 43f928ab0210182ea00720f6bf6eea9af999db52 SHA-256: bd204ed5902aef1cfa7eb8c11c77504fe08870ea3180c00aa805df1d6572234d
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file indicates an attempt to deliver a secondary malicious component. The ML classifier's output of 0.999996 strongly supports the malicious classification.

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
9ff1cfdc49ae48cb551db09564b17b54d9c2850cd7047f4a37c3e1bfb81795af
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19150 bytes