clamav-unofficial-sigs software package provides update script for 3rd-party clamav signatures, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install clamav-unofficial-sigs
clamav-unofficial-sigs is installed in your system.
Make ensure the clamav-unofficial-sigs package were installed using the commands given below,
$ sudo dpkg-query -l | grep clamav-unofficial-sigs *
You will get with clamav-unofficial-sigs package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Utilities |
| Package | clamav-unofficial-sigs |
| Version | 3.7.2-2 |
| Description | update script for 3rd-party clamav signatures |
| Sub Section | Utils |