Canonical maintains old releases at:

To understand the file, let’s break down the string:

Attackers sometimes repackage old, unsupported OS versions (like 16.04.4, whose standard support ended in April 2021) to lure users looking for legacy software. These tarballs may include:

The "linux-ubuntu-desktop-16.04.4.tar.gz" file represents a snapshot of Ubuntu's robust and feature-rich desktop environment as of 2016. While newer versions of Ubuntu have been released since then, Ubuntu 16.04.4 remains relevant for those who prioritize stability and have specific requirements that newer versions may not fulfill. Its long-term support period has ended, but it continues to be used in environments where upgrading is not immediately feasible.

Using clamav or a multi-engine scanner (e.g., VirusTotal CLI upload):

Unlikely. Official kernel source tarballs for Ubuntu are named like linux-source-4.4.0-116.tar.bz2 and are fetched via apt-get source linux .

(root file system) backup, a specialized container image, or a deployment package for cloud environments.