RTF malware analysis — malicious · d74ec4c8e4b38d52

MALICIOUS

RTF

302.4 KB

MD5: f014edb6da40bf335c14a621904e32e5 SHA-1: 84afd24b65300db071dc0d115a338a3dbd4c4379 SHA-256: d74ec4c8e4b38d5258d5fcee7364b8dd0eeb165e6b0aa3edc544b160ceec7f89

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The RTF file contains embedded OLE objects and uses an ".objupdate" directive, indicating it's designed to exploit OLE vulnerabilities. The document body explicitly instructs the user to 'download the document and click Enable Editing', a typical social engineering tactic to bypass macro security. This suggests the file is a macro-based dropper designed to execute malicious code upon user interaction.

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.
\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
OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM

RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
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_off000008fd.bin` `0f8f39809ba1853196fbaffb0092b24117c35f92dd429c2c6ae12f90989d6ffc`	rtf-objdata-decoded	RTF \objdata at offset 0x8FD	59021 bytes
`objdata_01_off0001d71c.bin` `12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece`	rtf-objdata-decoded	RTF \objdata at offset 0x1D71C	12261 bytes
`objdata_02_off0002372e.bin` `5de732ece55617b212baa0db7102c497ed7e809d372953a6a31ff14adb5754f5`	rtf-objdata-decoded	RTF \objdata at offset 0x2372E	2632 bytes

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