Malicious PDF — malware analysis report

Static analysis result for SHA-256 1865d0b57f720630…

MALICIOUS

PDF

11.6 KB
MD5: 3e73947ce786fcb49c48e9e55a8ed2a7 SHA-1: 94015c90402e1982b795dd6e31b3953d86427607 SHA-256: 1865d0b57f720630bd4144c75562c86f24cd5b7391d84281346c9c53a9b69d4d
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 (Pdf.Exploit.Dropped-78) and an ML classifier. It contains an embedded script payload and an embedded file, indicating it is designed to execute arbitrary code. The embedded file is the most significant IOC.

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
88e623d9c5f7e0dc8e1cc343404c567597571fe30448a8835dfaed91304c75b6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11172 bytes

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