/usr/share/libdiscover/backends/knscomic-backend.desktop is in plasma-discover-common 5.8.5-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | [Desktop Entry]
Type=Service
Icon=face-smile-big
X-KDE-Library=kns-backend
X-KDE-PluginInfo-Name=knscomic-backend
X-Muon-Arguments=comic.knsrc
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