Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 d7e1e25e148eb7af…

MALICIOUS

RTF / .DOC

260.4 KB
MD5: 0609c18b64b9026fd9bfe9b0046be54b SHA-1: fa28c5187736a95e60ff7cc2c7a1b9733f620423 SHA-256: d7e1e25e148eb7af378ab66a67fb54707777849ef3a64493f17a03f0f59c4d79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment

The RTF document contains multiple OLE objects and uses an \objupdate directive, indicating it is designed to exploit OLE vulnerabilities. The document body explicitly instructs the user to 'download the document and click Enable Editing', a common lure to bypass macro security settings and execute embedded malicious content. No scripts were extracted, but the OLE object structure suggests it likely attempts to download and execute a second-stage payload.

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 4 \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.

FilenameKindSourceSize
objdata_00_off0000091c.bin
b490e7cad68ba99717b380a4b9e2053dc330e0952a160a78e5c9db56a66b98a2		 rtf-objdata-decoded RTF \objdata at offset 0x91C 37480 bytes
objdata_01_off00012ef1.bin
12289ea42203fe86d5d6e86e52672f752ead5709842d0443203b40a4917d5ece		 rtf-objdata-decoded RTF \objdata at offset 0x12EF1 12261 bytes
objdata_02_off00018f01.bin
82ad79f62d6dfc14694497a9a15cafc0d7d55f5ec8ce91df6ced1e7f663a3922		 rtf-objdata-decoded RTF \objdata at offset 0x18F01 2632 bytes

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