diff --git a/frontend/src/features/maintenance/hooks/useMaintenanceReceiptOcr.ts b/frontend/src/features/maintenance/hooks/useMaintenanceReceiptOcr.ts
index 725ff1a..03a6a10 100644
--- a/frontend/src/features/maintenance/hooks/useMaintenanceReceiptOcr.ts
+++ b/frontend/src/features/maintenance/hooks/useMaintenanceReceiptOcr.ts
@@ -235,7 +235,9 @@ export function useMaintenanceReceiptOcr(): UseMaintenanceReceiptOcrReturn {
     setResult(null);
 
     const imageToProcess = croppedFile || file;
-    const imageUrl = URL.createObjectURL(imageToProcess);
+    const isPdf = imageToProcess.type === 'application/pdf' ||
+      imageToProcess.name.toLowerCase().endsWith('.pdf');
+    const imageUrl = isPdf ? null : URL.createObjectURL(imageToProcess);
     setReceiptImageUrl(imageUrl);
 
     try {
@@ -255,7 +257,7 @@ export function useMaintenanceReceiptOcr(): UseMaintenanceReceiptOcrReturn {
       console.error('Maintenance receipt OCR processing failed:', err);
       const message = err.response?.data?.message || err.message || 'Failed to process maintenance receipt image';
       setError(message);
-      URL.revokeObjectURL(imageUrl);
+      if (imageUrl) URL.revokeObjectURL(imageUrl);
       setReceiptImageUrl(null);
     } finally {
       setIsProcessing(false);