Hi Stefan,
extracting 465209_intl_x64_zip (the Project Server 2013 June 2013 CU) will get you two files:
ubersrvprj2013-kb2817415-fullfile-x64-glb.exe and
ubersrvprj_1.cab
I remember this being exactly the same in revision 1 of the last CU where we were not able to install it. Can you confirm this?
Thanks,
Dirk