Malicious PDF — malware analysis report

Static analysis result for SHA-256 298ad953fccc7acf…

MALICIOUS

PDF

18.9 KB
MD5: a7311a28c45d557dbcbce7a529f1daed SHA-1: dfd700c16fb4083457064177fee20a89539d4e62 SHA-256: 298ad953fccc7acf906d4dbc5e78c7c1548576b4e57e31325698ffba94144262
126 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and a high ML classifier score. The PDF contains an embedded script payload and is flagged as an XFA form, indicating a potential exploit vector. While no specific family is identified, the presence of embedded content and exploit indicators points to a typical malicious PDF delivery mechanism.

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
210c246f269a63bc3a45d23fb342e8c40494e161aa051113f070cc8f53c11d75
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18562 bytes