MALICIOUS
240
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The sample is a Microsoft Word document that exploits CVE-2006-6456, a vulnerability related to malformed table SPRMs. It also contains an embedded PE executable and references to LoadLibrary and GetProcAddress APIs, indicating it likely attempts to load and execute malicious code. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the technical findings.
Heuristics 5
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CVE-2006-6456 — Microsoft Word malformed table SPRM critical CVE exact CVE_2006_6456WordDocument contains a malformed table border-color SPRM in the CVE-2006-6456 shape: a valid table-SPRM cluster is followed by an invalid high-byte 0xFF SPRM where Word expects a normal sprmTBrc*Cv record. Vulnerable Word 2000/2002/2003 parsers corrupt memory while handling this malformed data structure.
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Embedded PE executable critical OLE_EMBEDDED_EXEMZ/PE header found inside document — possible embedded executable
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Reference to LoadLibrary API high SC_STR_LOADLIBRARYReference to LoadLibrary API
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Reference to GetProcAddress API high SC_STR_GETPROCADDRESSReference to GetProcAddress API
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 167,684 bytes but its declared streams total only 94,801 bytes — 72,883 bytes (43%) 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).
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_office_0001c000.exeea6cb83bda3b85f85cd2ee941a10c00ee2b59f56022441f8e0e0990dfc688761 |
embedded-pe | Office MZ+PE at offset 0x1C000 | 52996 bytes |
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