The problem appears to be that d3kbcqa49mib13.cloudfront.net cannot be resolved.
This would usually happen if you have no Internet access from the machine where you are building the virtualbox or you access Internet with some limitation (such as through proxy).
One check you can do is to try accessing http://d3kbcqa49mib13.cloudfront.net/ from a browser from the machine on which you are building the virtualbox image.
If you cannot access it, you would need to work with your IT to be able to make it work.
If you can access it, can you double check if you access Internet via a proxy or some other type of connectivity restriction.
It should probably help if you can execute this from a machine with a fully opened Internet access. Once build the VM can be copied on any other machine you want to work on.
Hope this helps
The problem is that the build process cannot access d3kbcqa49mib13.cloudfront.net
In other words, the virtual machine being built try to execute a wget on this host but this host cannot be found.
Using a different machine can be useful especially if it access the Internet in a different way than this machine.