Is there any utility or command on Ubuntu for checking spelling errors in a pdf file? Or a way to integrate spellcheck in Evince?
You can use LibreOffice with the pdf-import extension, or use Abiword to edit your pdf documents with a spell checker.
The extension can be installed on the command line with:
sudo apt-get install libreoffice-pdfimport
And Abiword can be installed with:
sudo apt-get install abiword