diff --git a/cuckoo/cuckoo_main.py b/cuckoo/cuckoo_main.py
index 969eee3..8bca6cf 100644
--- a/cuckoo/cuckoo_main.py
+++ b/cuckoo/cuckoo_main.py
@@ -1084,6 +1084,9 @@ def _remove_illegal_characters_from_file_name(self) -> None:
             self.log.debug(f"Renaming {self.file_name} because it contains one of {ILLEGAL_FILENAME_CHARS}")
             self.file_name = ''.join(ch for ch in self.file_name if ch not in ILLEGAL_FILENAME_CHARS)
 
+        if self.file_name.startswith(" "):
+            self.file_name = self.file_name.lstrip()
+
     def _assign_file_extension(self, kwargs: Dict[str, Any]) -> str:
         """
         This method determines the correct file extension to the file to be submitted
diff --git a/tests/test_cuckoo_main.py b/tests/test_cuckoo_main.py
index 6f29bdb..367fe1d 100644
--- a/tests/test_cuckoo_main.py
+++ b/tests/test_cuckoo_main.py
@@ -1082,7 +1082,7 @@ def test_decode_mime_encoded_file_name(test_file_name, correct_file_name, cuckoo
 
     @staticmethod
     def test_remove_illegal_characters_from_file_name(cuckoo_class_instance):
-        test_file_name = ''.join(ch for ch in ILLEGAL_FILENAME_CHARS) + "blah"
+        test_file_name = " " + ''.join(ch for ch in ILLEGAL_FILENAME_CHARS) + "blah"
         correct_file_name = "blah"
 
         cuckoo_class_instance.file_name = test_file_name