Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb680f4ceb2b7d7…

MALICIOUS

PDF

19.0 KB
MD5: cbaa36889ca864d3adae3eb0f46f0ff5 SHA-1: 0ced87c3c582bcaf073925099ab8577f100be0bb SHA-256: 5eb680f4ceb2b7d7639ed793c085315e95bd515124ec450e9fa9d0c94e6a9acd
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 multiple heuristics, including a critical ClamAV detection for Pdf.Exploit.Dropped-78 and a high ML score. It contains an embedded script payload and an embedded file, suggesting it is designed to exploit vulnerabilities and download further malicious content. The embedded file 'embedded_file_obj0008.bin' is the primary IOC.

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
c61f8788006f2f46777e272bf4ca9a0ea4bf2111a23a359deede6331fff0839b
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18671 bytes