Reverse engineering the binary through static analysis is the correct answer as it allows the examiner to inspect the code without executing it, which prevents potential harm to the examiner's system or network. Simply executing the binary would be unsafe as it might execute malicious functions. Disassembling and using a sandbox, though both useful techniques, are incorrect because disassembly is part of reverse engineering and using a sandbox still involves execution of the binary; hence it does not match the constraint of analyzing without execution as stated in the question. Decompilation alone is insufficient without the broader context and processes involved in reverse engineering.