How to merge PDFs contain Digital Signature

I have a pdf document which is digitally signed, I want to attach this digitally signed Pdf to another normal pdf using UiPath, is it possible ? I tried to attach pdf which contains digital signature with the another. I am able to merge pdfs but the final pdf is not retaining digital signature in the output pdf file. Is it possible in UiPath ?.(Looking forward for General opinion or ideas also if any)