MALICIOUS
100
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The file is a Microsoft Excel document that triggers a critical heuristic for CVE-2009-3129, indicating an exploitation of a record overflow vulnerability. This vulnerability allows for arbitrary code execution on the victim's machine. No document body or scripts were extracted, but the exploit itself is sufficient evidence of malicious intent.
Heuristics 2
-
CVE-2009-3129 — Excel FEATHEADER record overflow critical CVE exact CVE_2009_3129Workbook BIFF stream contains a FEATHEADER (Feature Header) record with anomalous size (record_size=22, isf=4, cbHdrData=4). Legitimate FEATHEADER records are tiny (<100 bytes) and carry cbHdrData values that fit in the record body; the value here is the documented CVE-2009-3129 exploit primitive — cbHdrData drives a memcpy with attacker-controlled size, leading to memory corruption and code execution in Excel 2007/2003.
-
OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 62,985 bytes but its declared streams total only 24,565 bytes — 38,420 bytes (61%) 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).
Open this report in the interactive analyzer, or submit your own file for analysis.