What term is used to describe a tactic of pursuing and extracting information for the purpose of making a sale or performing a social engineering attack?

The correct answer to the following question will be "Cold calling".

Explanation:

In such an effort to sell products or services, the above makes an inappropriate call on (somebody else), by phone or the internet or in an individual. This cold call is meant to involve a candidate in a dialogue regarding their interests, and to decide subsequent measures.

Therefore, Cold calling is the right answer.