Malicious PDF — malware analysis report

Static analysis result for SHA-256 67110c30635b9109…

MALICIOUS

PDF

11.8 KB
MD5: 245a92a08a92b1eca65dca94958e7075 SHA-1: e970f6259a69eb191046f8767266cc2b3e824436 SHA-256: 67110c30635b91097cf2096e6ac450e063b10b36e14bd369c43a9e9114693c68
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The presence of embedded scripts and an embedded file further supports this, suggesting the document is designed to execute a secondary payload. The ML classifier also strongly indicated maliciousness.

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 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 script payload in PDF stream low 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 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
1daa92e8499a0b4ba32027bf181fb9c9bf283d07276dcc2c6b9bc37dee162937
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11280 bytes