Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad95aaddb1ca013a…

MALICIOUS

PDF

11.6 KB
MD5: 2b99d8f5fe3a1f4f688c5717209e0345 SHA-1: 458bb943b3fb5df010a0144c4031e53299e6594d SHA-256: ad95aaddb1ca013afae6c636b1165475e48b79052ab51a0e49b394b7ed62fb72
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The file is identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting the PDF is designed to exploit vulnerabilities and deliver a secondary malicious payload. The embedded URLs are benign or unknown, providing no further IOCs.

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
1ab648b3dc6c43c9d74dce8ead9d2f4e499f26a43e451833f580465344f143c4
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11168 bytes