Sam didn't bother to hide his presence, he just went there on the harbinger at his top speed and the forest along his path is being torn apart just from his tailwinds.
When the five solar fragments felt the overwhelming presence, they are shocked. Before they could react though, Sam is already in the middle of all five of them.
"Five Consummate stage cultivators? Your balls must be made of Meteorite sand to come after me with your pathetic strength."
The five of them exchanged glances and decided to run away, but too bad it didn't work out. As soon as they wanted to move, Sam's shadows emerged and held them in the place.
"You are not going anywhere until I get my answers."
"You are not getting any answers. We took pills for selective memory loss. We don't know how we came here."
Sam looked at him and let the specter out to check on them.
Specter took a brief look at their memories and decided that they are not lying.