According to http://www.oracle.com/technetwork/middleware/soasuite/learnmore/vmsoa-172279.html this is a Virtualbox disk image and your question is about resizing a Virtualbox disk image, which is probably better placed in the VM forum e.g. Virtual Desktop Infrastructure and SunRay Clients
To my knowledge there is no easy command to simply resize a disk image using the VirtualBox Virtual Disk Manager and you will have to either add another disk and play with Linux LVM, or clone the existing disk image to a larger disk image. i.e. VBoxManage clonehd --existing oldhd.vdi newhd.vdi
Both steps are not easy to explain. I suggest to check the VirtualBox documentation at http://www.virtualbox.org/manual/UserManual.html or search the internet for information about how to resize a vdi disk image.
This inquiry was originally posted to the Oracle Authentication Services for Operating Systems forum.
It has now been moved to the suggested Virtual Desktop Infrastructure and Sun Ray Clients General Discussion forum for closer topic alignment.