Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfe86bca7a01b66…

MALICIOUS

PDF

19.6 KB
MD5: 65f06a035f8636446870b206227e59c8 SHA-1: b791b5e4b78d4187599287552b39b48904c98b26 SHA-256: 5cfe86bca7a01b6635d69f406ff1d7e103a3aa594e7793ad765d5de29446db93
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file suggests the document is designed to exploit a vulnerability and download a secondary payload. The ML classifier also strongly indicated maliciousness.

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
a225d399d3a69e7fa47a817203f8b8f5343ff31eebe2ad3b3a823f1f18b00726		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19340 bytes

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