The Green Shirts delivered an impressive defensive performance to overcome the home side despite Bangladesh enjoying greater possession throughout the match.
Pakistan's disciplined defence successfully neutralised the hosts' attacking moves and kept their opponents from scoring.
The decisive moment came in the 86th minute when in-form forward Abdul Samad produced a brilliant individual effort. He beat Bangladesh's defenders before firing a superb left-footed shot into the net to give Pakistan a crucial 1-0 lead.
Bangladesh launched several attacks in the closing stages in an attempt to equalise, but Pakistan's players remained composed and defended their advantage until the final whistle.
The closing moments also witnessed reports of unsporting behaviour among spectators and heated exchanges involving players from both teams. However, Pakistan maintained their composure and secured a memorable victory.
Under the guidance of head coach Nolberto Solano, Pakistan have now moved within one victory of winning their first-ever SAFF Championship title.
Pakistan will face arch-rivals India in the tournament final, scheduled to take place on November 17. The highly anticipated encounter will provide the Green Shirts with an opportunity to create another milestone in the country's football history.
Pakistan's historic qualification has raised hopes of a first SAFF Championship trophy and marks a significant achievement for the national football team.