Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6dc368041a57e5c…

MALICIOUS

PDF

19.0 KB
MD5: f68029fd76ed8b94ac84812aa7136684 SHA-1: 4b227b72ae9cf9d72b54fe427c0a78922e47da38 SHA-256: d6dc368041a57e5c002aa4b2ce39a596551936655c8360230ab97506f82b1c17
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). It contains an embedded script payload and an embedded file, indicating it is likely a dropper or exploit document. The presence of XFA forms and embedded objects are common characteristics of malicious PDFs.

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
87ab3680c821ca180e79c36948b7886e633b693b058fc24f710bb5ba35f4c8a3
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18650 bytes