RTF / .DOC malware analysis — malicious · 9e8a892316c7b59f

MALICIOUS

RTF / .DOC

227.7 KB

MD5: 39941900fcc8c021bff5d26385901cc9 SHA-1: f91524a4ccb26559eaafd953c8dcca75869b5905 SHA-256: 9e8a892316c7b59ff0241a5f892ee9040e3043c70336e2af6063b32fa150aad4

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 forces activation via \objupdate. This strongly suggests a lure to trick the user into enabling content, a common tactic for malware droppers. The presence of embedded OLE objects and the SE_ENABLE_LURE heuristic further support this attack pattern. No specific family could be identified from the available evidence.

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` `c1bc1432a2b989abd886f6139f0c4482fbb5a9eea79c2fe940a07dca07f21bb1`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19832 bytes
`objdata_01_off0000ab28.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xAB28	2632 bytes
`objdata_02_off0000c0cb.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xC0CB	12297 bytes

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