\documentclass[a4paper,portrait]{article}
\usepackage{pdfpages}
\usepackage{multido}
\begin{document}
\includepdf[landscape,angle=90,pages=1,fitpaper=true,trim=0 0 0 0,offset=0 0,turn=true,noautoscale=false]{formulario-orig.pdf}
\includepdf[landscape,angle=-90,pages=2,fitpaper=true,trim=0 0 0 0,offset=0 0,turn=true,noautoscale=false]{formulario-orig.pdf}
\end{document}
\end{document}