Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f93bc863b557edb…

MALICIOUS

PDF

11.7 KB
MD5: a8730b7047d63511cb3964c57e6c5158 SHA-1: 55a3067ca59b5a903e9d1cf67d13f2732356aa91 SHA-256: 0f93bc863b557edb82fbe8999b4fb283a72c3cd3652533d4c2194cd6a1d4837d
116 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The presence of an embedded script payload and an embedded file suggests the document is designed to exploit vulnerabilities and download a secondary payload. The ClamAV detection name 'Pdf.Exploit.Dropped-78' further supports this.

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
27ff781fefdb77cf237ee7613d7ca90f296d54c371d294b8866c206022ea414d		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11172 bytes

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