RTF / .DOC malware analysis — malicious · ecef57afce8a7d5e

MALICIOUS

RTF / .DOC

229.2 KB

MD5: afe48e30fc3f12c2b6ad7d19ae1fff8e SHA-1: 2ded99867d8b3e9499b10743ae732efec19ccc8e SHA-256: ecef57afce8a7d5eed2080401da0ce36d67c2493cf1385b432a6bf0a65f6e521

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 an automatically linked object that is forced to update upon opening. This technique, combined with the 'enable lure' heuristic, strongly suggests the document is designed to trick the user into activating embedded content, which is a common method for delivering malware. No specific family could be identified, and no scripts or URLs were extracted for further IOCs.

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` `bd0fda77f8ea243218a6a112f6afd5579658b445ff46ffc29d98168476b3b7d1`	rtf-objdata-decoded	RTF \objdata at offset 0x965	20618 bytes
`objdata_01_off0000b18c.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xB18C	2632 bytes
`objdata_02_off0000c72f.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC72F	12297 bytes

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