Malicious Office (OOXML) / .XLSX — malware analysis report

The file is an Excel spreadsheet with a malicious verdict. Although no specific heuristics fired, the file's nature as an Office document with a malicious verdict suggests it is likely a macro-enabled document. Such documents are commonly used to download and execute further stages of malware. Without specific script content or heuristic firings, the exact attack vector and payload remain undetermined.