Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7c3e370558d017…

MALICIOUS

PDF

11.8 KB
MD5: 368ca3d82a48473c7f8f49bb595271d9 SHA-1: 8ed9b2c1bb2eb1f48cc154f8cc23e13cd8e121c4 SHA-256: ca7c3e370558d017cde85766e4c4d5aadb6532c71b5170ebc1296af1ff328bbc
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious, specifically identified as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file further supports its role as a dropper or exploit delivery mechanism. While specific script content is not detailed, the overall structure points to a common attack pattern for PDF-based malware.

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
7309fa03c29f03ca5e3f25f95e398d4a885b357b7b1021d78b495e159a927f1d
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11321 bytes