Get your list of IP's into sublime text or notepad++ so its easy to work with
You can use excel to generate the objectname[x]
Create the address objects
set address [address-name] ip-netmask [ip-address]
eg
set address malware-ip1 ip-netmask x.x.x.x
set address malware-ip2 ip-netmask y.y.y.y
Assign the objects to a group
set address-group [address-group-name] static [address-name]
eg
set address-group malware-ips static malware-ip1
set address-group malware-ips static malware-ip2
Once I have my script
Connect to the CLI of the palo and paste it in
I have found it only allows you to paste 80 lines or so
Sometimes I need to split up my pastes but it works for me haven't had time to look into it
Once you've got it all in there don't for get to commit
Now you can go back to the web interface / GUI and create a rule with the new address group which should contain all your IP's
