Is the friend who guided another to an investment obligated to return his money after the latter's withdrawal and failure to comply with the company's terms for refunding the amount, knowing that the company has not disappeared and the former has not received any money from the latter?

The basic principle is the permissibility of guiding others to a permissible investment for a fee, which falls under the category of ju'alah (commission/stipulated payment). The intermediary is not liable for guarantee unless he voluntarily offers to guarantee what is permissible to guarantee. We are unaware of the permissibility of an investment that cannot be recovered except through work. This appears to be a prohibited multi-level marketing scheme. In the event that the contract must be dissolved due to its impermissibility and the company refuses to return the money, there is no liability on the intermediary. Rather, the liability rests with the company for wrongfully taking his money.