How it affects the score
The signal contributes its weight times the detector's confidence. Signals combine so several medium findings add up, while one weak finding cannot decide a verdict.
All signals
File structure layer
Digital signature broken
pdf_signature_invalid
The PDF is signed, but the signature does not validate or content changed after signing.
- Severity
- high
- Weight
- 60
- Layer
- File structure
- Max effect
- up to 60 of 100
Innocent explanations
Some tools break signatures when they only add comments.
What to do
Ask for the file as originally signed.
Other file structure signals
PDF producer mismatchpdf_producer_mismatchModified after creationpdf_modified_after_creationSaved again after creationpdf_incremental_updatesInconsistent fontpdf_font_inconsistencyText covered or overlaidpdf_text_overlayVisible text differs from text layerpdf_text_layer_mismatchProducer newer than the documentpdf_anachronistic_producerDigital signature intactpdf_signed_validActive contentpdf_active_content
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