icmp messages in log

Found in my log several messages such as:

input: in: combo1 out:(none) src-mac: f8:66:f2:28:9a:ff proto ICMP (type 8, code 0) 46.234.125.89 > my_ip_address

Shall I consider as an attack ?

No, that’s an incoming echo request (ping).
Probably the most harmless incoming connection.
Better check your firewall rules why that is logged.
-Chris