Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f27dbeece7a2851…

MALICIOUS

PDF

11.8 KB
MD5: bd93feeb10c78132f28420f1a235f93c SHA-1: 2de1527bac20c71f032e66e0d8e1b8242aa3a944 SHA-256: 7f27dbeece7a285135d9f20cec1b257f8cc9a8cb4ffcd4ccd0055d0b14d64b6b
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). The presence of an embedded script payload and an embedded file suggests it is designed to exploit vulnerabilities and drop a secondary payload. The embedded file 'embedded_file_obj0008.bin' is a primary indicator of compromise.

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
d8debb903998bbeab1046120821bd611be3144bb61515f6f03f5c6b6a749a664
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11325 bytes