Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd5b8346dd19abe…

MALICIOUS

PDF

12.0 KB
MD5: da6b0538f0b689293ada62de6b4933af SHA-1: 738bc0fe131ef2848777cf995b3c4d138120d163 SHA-256: ccd5b8346dd19abe0085a28f8136e1a5eca90bbbf4b243a32a81eaeaf1a1f2b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution - Malicious File

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML score. The presence of an embedded script payload and an embedded file indicates the PDF is designed to exploit vulnerabilities and drop further malicious content. The document body contains obfuscated JavaScript-like elements, suggesting an attempt to execute code.

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
afb0e20b157b5389ddad30e3cfe685343be8b87e4fa1e779e3025427222cbfc8
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11534 bytes