Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c30a621c07887b…

MALICIOUS

PDF

11.9 KB
MD5: fa3a20fe8d80f0a02742626b1cabde99 SHA-1: 95f0dd1d1acc1fb31af230b2c3d0928c406cb283 SHA-256: c6c30a621c07887b31522a3b585627f283654894f0a5db8c3ccf27722e6bd845
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78', indicating it contains an exploit and likely drops a secondary payload. An embedded script payload was also detected. The presence of embedded files and XFA forms are common characteristics of malicious PDFs used for exploitation.

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
78b8d4f1eecc13354da186648e16378e0e5e9fdde4697feff08223e7140fb4bb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11396 bytes