Can I Pass the CA Foundation Exam in One Month? 

Yes. Of course, but you have to a plan as to which topic you are starting with. And study according to that plan.

Achieving CA Foundation syllabus completion in one month demands an intense, focused study plan.

One has to practice several mock tests and previous papers to assess the preparation level. And study for at least 15 hours daily.

Now talking about subjects, math is difficult as compared to other subjects. Have to clarify your concepts in math.

Law is also considered a difficult subject, understand all its concepts. Most of the questions will be based on case laws.

In Accounts, most of the portions will be from your 12th standard. So make all your concepts clear in every chapter. 

Economics is what you might have studied in class 12th, yet economics has to be read once.

Overall, you just need to understand and know the concepts. And do not go for books other than ICAI study material.