pdfcrack from home:sleep_walker:aggregate project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:sleep_walker:aggregate/openSUSE_Tumbleweed/home:sleep_walker:aggregate.repo zypper refresh zypper install pdfcrack