MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is identified as malicious by ClamAV with the signature Doc.Dropper.Agent-6966177-0. Static analysis reveals a critical vulnerability exploit for CVE-2009-3129 in Excel, indicating it's designed for client-side execution. Additionally, the file contains an appended executable payload, suggesting its primary purpose is to drop and run additional malware.
Heuristics 4
-
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.
-
ClamAV: Doc.Dropper.Agent-6966177-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Dropper.Agent-6966177-0
-
OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 232,168 bytes but its declared streams total only 34,044 bytes — 198,124 bytes (85%) 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).
-
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.
Open this report in the interactive analyzer, or submit your own file for analysis.