RTF malware analysis — malicious · d407be0656a3b89d

MALICIOUS

RTF

226.9 KB

MD5: 46b4f0056a767a74604339f42c3b3694 SHA-1: 7735cad9bdfd2b3717d1d49241fcdfa840fe3f4c SHA-256: d407be0656a3b89dd4d6789df741efceeaaf7b756e10e7be13d2c5efb1dce9e9

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF file contains multiple OLE objects, with one specifically configured for automatic updates (".objupdate"). This strongly suggests an attempt to automatically execute embedded content, bypassing user interaction and security prompts. The presence of "SE_ENABLE_LURE" heuristics further indicates a social engineering tactic to trick the user into enabling content. While no specific script or URL was extracted, the OLE object activation is the primary attack vector.

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` `6011942429d13f1c670c78d608d9c53a12dff6b2b3664065ac42f13c7a070b14`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19472 bytes
`objdata_01_off0000a83c.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xA83C	2632 bytes
`objdata_02_off0000bddf.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xBDDF	12297 bytes

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