RTF / .DOC malware analysis — malicious · 95eebe3aee67a21a

MALICIOUS

RTF / .DOC

536.4 KB First seen: 2021-10-01

MD5: 0d2b55984c139a877edf7da2e50ba1d6 SHA-1: 3f07a5d368baaf66fcd3994edc5a262ae9cec164 SHA-256: 95eebe3aee67a21ae1a73a37612740f589c7c015cad6dd5a6fb73f8c7f05f619

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The RTF document contains multiple embedded OLE objects, with specific heuristics indicating automatic linking and activation. The presence of an 'enable lure' suggests the document is designed to prompt the user to enable macros or content, which would then trigger the embedded OLE object. This is a common delivery mechanism for malware.

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_off00000bb0.bin` `e2baee6622e6852c9410f9ec2f210a10476d039371f92b47de924d5fdb294613`	rtf-objdata-decoded	RTF \objdata at offset 0xBB0	171550 bytes
`objdata_01_off00057e29.bin` `9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470`	rtf-objdata-decoded	RTF \objdata at offset 0x57E29	2632 bytes
`objdata_02_off000593cc.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x593CC	12297 bytes

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