Hidden worksheet

Hidden and 'veryHidden' Excel sheets are commonly used to conceal macro scaffolding, staging data, or intermediate payload construction from the user. Caveat: hidden sheets are routine in legitimate professional Excel workbooks — financial models hide calculation sheets and lookup tables, enterprise templates hide configuration sheets, and many vendor-supplied spreadsheets protect their formulas this way. This finding is low-signal on its own; treat as significant only when combined with VBA macros or external relationships.