\documentclass{article}
\usepackage{multirow,bigdelim}
\usepackage{xepersian}
\settextfont{XB Niloofar}
\setdigitfont{XB Niloofar}
\setlatintextfont{Linux Libertine}
\usepackage{arydshln}
\begin{document}
\[
\left[\begin{array}{cc}
\underbrace{\begin{array}{cccc:c}
\lambda_1&1&\cdots&0&\rdelim\}{5}{0cm}[$\mathbf{k}$]\\
0&\lambda_1&\ddots&\vdots&\\
\vdots&&\ddots&1&\\
0&&\cdots&\lambda_1&\\ \hdashline
\end{array}}_\mathbf{k}
&\hspace{-1cm}
\begin{array}{lll}
&&\\
&&\\
&&\\
&&\\
&&\\ \hdashline
\end{array}\\[-20pt]
\begin{array}{cccccccc:c}
&&&&&&&\hspace{0.1cm}&\\
&&&&&&&\hspace{0.1cm}&\\
&&&&&&&\hspace{0.1cm}&
\end{array}
&\hspace{-0.6cm}
\begin{array}{lll:l}
&&&\\
&&&\\
&&&\\ \hdashline
&&&
\end{array}
\end{array}\right]
\]
\end{document}