RTF / .DOC malware analysis — malicious · 433fef750a44d6d4

MALICIOUS

RTF / .DOC

229.3 KB

MD5: 0284c94401a743d97b9cca52ac790864 SHA-1: fc3a473b80e9f717a68c54374aadc016cfe0d9ed SHA-256: 433fef750a44d6d44ebc9acf291ae3ad5812531d8aba3bdf543d44dcff943694

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The RTF document contains multiple OLE objects, including automatically linked and updated objects, indicating an attempt to execute embedded code. The presence of a 'Macro/content-enable lure' heuristic confirms the document instructs the user to enable content, a common social engineering tactic. While no specific scripts were extracted, the OLE object activation strongly suggests the document's purpose is to download and execute a secondary payload.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000965.bin` `e9481e05b748756fadc6bbdcb7545863ac9bba9b24c41dcbb1404128b358343b`	rtf-objdata-decoded	RTF \objdata at offset 0x965	20622 bytes
`objdata_01_off0000b194.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xB194	2632 bytes
`objdata_02_off0000c737.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC737	12297 bytes

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