Is the tenant obligated to pay the overdue rent owed to the landlord, knowing that the leased property was for the company he works for, and that no contract was drawn up, and the company delayed payment?

If you informed the landlord that you are renting the apartment for your organization and not for yourself, then the collection of rent will be from the organization. However, if you did not mention this and rented it for yourself, then you are obligated to pay him the rent, and you can then claim reimbursement from your organization for what you have paid.