Malicious PDF — malware analysis report

Static analysis result for SHA-256 127e30b52bd1641d…

MALICIOUS

PDF

26.2 KB
MD5: 0d6ecb909e67f41e60233b06b6778206 SHA-1: f6a8d4edbd541f13d62d6ff675a0e17d016bc509 SHA-256: 127e30b52bd1641dfe0313de1da79df7f5f89496749dd706b260cdb144577797
116 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains embedded content and an XFA form, which are often used to deliver exploits. The embedded script payload and the ClamAV detection name 'Pdf.Exploit.Dropped-78' strongly suggest it's designed to exploit a client-side vulnerability for code execution.

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
f10cf8312343dcb23f0f27f968bd304206a647cd80b052c3578d88e6c5c04ecb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 26100 bytes