\documentclass{article}

\usepackage{graphicx,refcount,hyperref}

\newcounter{tmpcntr}

\begin{document}

\tableofcontents

% <some document content>

\setcounterpageref{tmpcntr}{sec:Dummy-Subsection}%
\subsection
  [Dummy Subsection]% ToC
  {Dummy Subsection \texorpdfstring{\href{something-sn=\thesubsection pn=\thetmpcntr tn=Dummy-Subsection}{\includegraphics[height=1ex]{example-image}}}{}}
\label{sec:Dummy-Subsection}
% <some more document content>

\end{document}