Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeafd726176db2be…

MALICIOUS

PDF

11.8 KB
MD5: c3c25d47a955a2d2d4478f28b3c70f9f SHA-1: 8406871e8235364c4f33d14409a4f56b3ead4287 SHA-256: aeafd726176db2be69ac2bf6b35bd740dff1ae42ced1f69ea24d857274a20be7
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically indicating an exploit and dropped payload. Heuristics confirm the presence of an embedded script payload and an embedded file, typical for exploit delivery. The embedded URLs, while not directly malicious, are part of the PDF structure.

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
0758dc2d66396a4b4f9804f59092fee0c73814322c6bc3041b15448d73ffdede
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11360 bytes