This indicates an attack attempt to exploit a Stack Buffer Overflow in Foxit Reader.
The vulnerability is due to improper handling of the GoToR action. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application via a crafted pdf file.
Foxit Software Foxit Reader 18.104.22.1681 and prior
Foxit Software PhantomPDF 22.214.171.1241 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.