Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeebe6b127dfb595…

MALICIOUS

PDF

19.0 KB
MD5: a991c0598334291eb8968d850f94070c SHA-1: bdc861d19bcb42a916420fa884cfbaed47ea5253 SHA-256: eeebe6b127dfb595ce307e3046ddb1b86d4beac8975f00ed2e51ea3913343406
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

The file is identified as malicious by ML classifiers and ClamAV (Pdf.Exploit.Dropped-78). Static analysis detected an embedded script payload within a PDF stream, indicating an attempt to exploit a vulnerability. The embedded file 'embedded_file_obj0008.bin' is likely the dropped payload. The XFA form suggests a potential vector for exploit delivery.

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
a345a903e3be46f5090d332826c670c49785957c068f1b4fc04705e1a767286c
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18684 bytes