macOS: safe removal/reinstall when Acrobat and bundled uninstaller fail code-signature verification

I am assisting the Mac owner with permission. We need an official, supported way to remove or reinstall Acrobat while preserving saved PDFs and keeping macOS security protections enabled.

The installed Acrobat app reports version 26.003.22075, bundle ID com.adobe.Acrobat.Pro. Read-only code-signature verification of Acrobat.app and its bundled Acrobat Uninstaller.app reported:

invalid signature (code or signature have been modified)

In architecture: arm64

The cause is unknown. The exact verification command and exit status were not retained, so this should not be taken as a malware diagnosis. Neither failing app has been run as part of this recovery attempt.

The normal Adobe macOS removal instructions require the bundled uninstaller, which is the component we cannot verify. The Acrobat Cleaner documentation says it is not an uninstaller and assumes a prior uninstall, so its suitability here is unclear.

Is there an official Adobe-signed standalone replacement uninstaller, or a documented procedure for this situation? What read-only checks should be performed first, and is a restart mandatory? We cannot restart immediately and do not want to disable Gatekeeper or bypass signature checks.

Please link the applicable official procedure and distinguish verified steps from possible workarounds. We are seeking free support, not a trial or subscription. No files or personal information are attached.