Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c8d9d1fdf7666e…

MALICIOUS

PDF

12.3 KB
MD5: c18c0007ed664cb611cea1ef242b6565 SHA-1: fa09a5c804b177257efb18d1c95467e2e8be1466 SHA-256: f2c8d9d1fdf7666e27619a26b7166370cc0edbda78c22c3f447ca43edd03000d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file strongly suggests it is designed to exploit vulnerabilities and download a secondary payload. The ML classifier also returned a very high score, indicating a high likelihood of malicious intent.

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
b1803249773dcb8b42af01ad87172a533e13c39dd518e0528b63712ccf315cf9
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11859 bytes