Your guest OS is shutting itself down. The important part of the logfile is this one line: "Exiting on CLI;HLT at 0x10:0x157fbbf"
Do you know exactly which OS (version and architecture) is installed on the virtual hard disk?
If it's a 64-bit OS (i.e. an amd64 or x86_64 kernel), you'll need to set the guest OS in the Virtual Machine's settings correspondingly, and you'll probably also need to go into your host's BIOS/firmware settings and enable Hardware Virtualization (VT) and check that Trusted Execution Technology (Intel TXT) is disabled(EDIT: looks like your CPU doesn't support TXT, so don't worry about that part)– this is necessary in order to run a 64-bit guest OS.
Cheers,
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Darius