rmpdfpass

#!/bin/bash
# you need pdftk pdfseparate inkscape

tmp_folder="tmp_folder"
files=""
output=""

mkdir $tmp_folder

echo "Splitting files ..."
pdfseparate "$@" $tmp_folder/%d_page.pdf

cd $tmp_folder

i=1
for part in `ls *.pdf | sort -V`; do
    tput cuu 1 && tput el
    echo "Removing password from part $i ..."

    if [ "$i" -lt "10" ]; then
        output="0${part}"
        mv $part $output
        part=$output
    fi

    inkscape -z -f $part -A $part
    files="$files $part"
    ((i+=1))
done

tput cuu 1 && tput el
echo "Concatenating files ..."
pdftk $files cat output ../$(basename "$@" .pdf)_ok.pdf

tput cuu 1 && tput el
echo "Cleaning up ..."
cd ..
rm -rf $tmp_folder