I tried to install and got this error:
sh@Notebook-PC:~$ sudo dpkg --install viber.deb
[sudo] password for sh:
(Reading database ... 319492 files and directories currently installed.)
Preparing to unpack viber.deb ...
Unpacking viber (4.2.2.6) ...
dpkg-deb (subprocess): decompressing archive member: internal gzip read error: '<fd:4>: invalid bit length repeat'
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing archive viber.deb (--install):
subprocess dpkg-deb --fsys-tarfile returned error exit status 2
Errors were encountered while processing:
viber.deb