Malicious PDF — malware analysis report

Static analysis result for SHA-256 9288d7ac76f4c861…

MALICIOUS

PDF

12.2 KB
MD5: d9d79b32299aee8d937a30660671fc40 SHA-1: 0c32515d955e14b0ec174822f41444f246829663 SHA-256: 9288d7ac76f4c86199e560f509936f7d7c72bda1e2cd8fc5ed431543ab6a20c3
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV (Pdf.Exploit.Dropped-78) and a machine learning classifier. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit PDF vulnerabilities and drop further malware. The embedded URLs, while mostly benign or unknown, are part of the PDF structure.

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
05e602f0721b70a5cde2d821bc8a19ef809fbbae947cace6ce518123bd279109
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11729 bytes