"A breakaway from the voter base has started (...) this campaign aims to stop that," Zoltan Novak, a political analyst at the Centre for Fair Political Analysis think tank said.
Another survey by pollster Median also showed a 5 point decline in support for Fidesz between February and October.
The questions in the survey portray the EU as favouring Ukraine over Hungary, one of its own members.
Earlier this week, Orban said the bloc's strategy of sending money and military aid to Ukraine had failed, and that he opposed starting membership negotiations with Kyiv.
His government has taken a different stance on Ukraine than the rest of the bloc, refraining from providing arms and criticising EU sanctions on Russia, although it has eventually backed all the sanctions so far.
Persons:
Viktor Orban, Orban's, Orban, Zoltan Novak, Boldizsar, Mark Potter
Organizations:
European Union, Fidesz, pollster, EU, Kyiv, Thomson
Locations:
BUDAPEST, European, Ukraine, Hungary, Russia