Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c085516cdfa8a69…

MALICIOUS

PDF

11.9 KB
MD5: f3202989ba3b958296001183503e79e9 SHA-1: eb4507a4c9dbe67f121cd0aabf24028831a75d5f SHA-256: 9c085516cdfa8a699686ae70176701264510b53c5b501fdd1f21edbbbfce4319
126 Risk Score

Malware Insights

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

The critical ClamAV detection 'Pdf.Exploit.Dropped-78' and the high ML classifier score strongly indicate malicious intent. The PDF contains embedded script payloads and XFA forms, which are common vectors for exploiting vulnerabilities. While no specific script content was detailed, the presence of embedded artifacts and exploit-related heuristics points to a dropper or exploit-laced document.

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
97cc2b9810d5cdd63ab802ab6fcc524b5313021c03c578b6c8e42d8cd759d6ab
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 11418 bytes