RTF / .DOC malware analysis — malicious · f0986ee9e586c78c

MALICIOUS

RTF / .DOC

229.1 KB

MD5: a35a9434f85e7bc9c04836453510f35b SHA-1: db1a995fb52a1e45ee42193bb62373e19a000ba9 SHA-256: f0986ee9e586c78c3ad2ebcb511747986c4f513a7213760703c4367825d0c1b8

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 embedded OLE objects, with specific heuristics indicating automatic linking and update triggers. This suggests the document is designed to automatically execute embedded content upon opening, bypassing user interaction for macro enablement. The presence of OLE object data and the SE_ENABLE_LURE heuristic strongly indicate a malicious dropper attempting to 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` `04e3d27885727505df4f0b6c88cc351d20af7293284363e5377378561c13b968`	rtf-objdata-decoded	RTF \objdata at offset 0x965	20567 bytes
`objdata_01_off0000b120.bin` `1af484323aa51f0bc067b498458ed2106db428c7b743185ac9a6e18e7b648e31`	rtf-objdata-decoded	RTF \objdata at offset 0xB120	2632 bytes
`objdata_02_off0000c6c3.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC6C3	12297 bytes

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