MALICIOUS
120
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious due to high-severity heuristics indicating an appended executable payload and significant OLE slack anomalies. The presence of appended executable-looking bytes strongly suggests the file is a dropper or downloader for a secondary stage. While no specific document body text or scripts were clearly extracted, the overall structure and heuristic firings point towards a malicious OLE file, likely delivered via spearphishing attachment, intended to execute arbitrary code.
Heuristics 3
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PEB access via FS segment (x86) high SC_PEB_ACCESSPEB access via FS segment (x86)
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 218,160 bytes but its declared streams total only 16,486 bytes — 201,674 bytes (92%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
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OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOADOLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
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