MALICIOUS
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 OLE object that forces an update upon opening. This technique is commonly used to lure users into enabling content, which then executes embedded malicious code. The presence of ".objdata" sections and composite monikers further indicates an attempt to embed and execute external or active content, likely for payload delivery.
Heuristics 6
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Composite Moniker in RTF OLE object high RTF_COMPOSITE_MONIKER_RELATEDRTF 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.
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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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OLE object data medium RTF_OBJDATARTF contains 3 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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Macro/content-enable lure medium SE_ENABLE_LUREDocument 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.bina49edb3842197dd5e82c5299625f6cfda5def96827fcf136360d90df92c4d075 |
rtf-objdata-decoded | RTF \objdata at offset 0xBB0 | 41386 bytes |
objdata_01_off00015c93.bin9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470 |
rtf-objdata-decoded | RTF \objdata at offset 0x15C93 | 2632 bytes |
objdata_02_off00017236.bin44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037 |
rtf-objdata-decoded | RTF \objdata at offset 0x17236 | 12297 bytes |
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