RTF / .DOC malware analysis — malicious · 44064d93545f3852

MALICIOUS

RTF / .DOC

229.2 KB

MD5: 9c26af04ea48f7d88b95a286c66c3f00 SHA-1: eaee1d09024ac079821084d7c19de6347e10232f SHA-256: 44064d93545f38520fcadc58302473ea99087deb716b245fcec3d3bd78b9ba34

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF document contains multiple OLE objects, with high-confidence heuristics indicating automatic linking and an update trigger for OLE activation. This suggests the document is designed to exploit OLE object handling to execute embedded code, likely as a lure to enable content and deliver a secondary payload. No specific family could be identified from the available heuristics.

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` `b3467bd2e6922ba8c2c8b9a466633c785f35cf8059d9accc0b74f46ae97f5e0c`	rtf-objdata-decoded	RTF \objdata at offset 0x965	20571 bytes
`objdata_01_off0000b12a.bin` `1af484323aa51f0bc067b498458ed2106db428c7b743185ac9a6e18e7b648e31`	rtf-objdata-decoded	RTF \objdata at offset 0xB12A	2632 bytes
`objdata_02_off0000c6cd.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC6CD	12297 bytes

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