Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 48accb18692df977…

MALICIOUS

RTF / .DOC

341.1 KB
MD5: 7208a7b222996d4bc09ef1ff90f4e6fa SHA-1: 8f64434a869f53831d34dd1ea1e2c6f599a8c978 SHA-256: 48accb18692df9774f22f810c1812ef3b3d0da6174406df8f9fb0840a513475f
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 embedded OLE objects, with specific heuristics indicating automatic linking and update triggers. This suggests the document is designed to exploit OLE object activation to execute embedded code. The 'SE_ENABLE_LURE' heuristic further confirms that the document likely instructs the user to enable content, a common tactic for macro-based malware droppers. No scripts were extracted, and no document body was available for analysis, but the OLE object manipulation strongly points to a payload delivery mechanism.

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.

FilenameKindSourceSize
objdata_00_off00000969.bin
ee92ca55f555f1eff5770bf85de9cdae8007afa2f2dcb31c6ea80f4436496ea5		 rtf-objdata-decoded RTF \objdata at offset 0x969 75692 bytes
objdata_01_off00027108.bin
10a6f8600e8524cd28573939a4ae1bdfdf968f5507d04011336569618d3ad498		 rtf-objdata-decoded RTF \objdata at offset 0x27108 2632 bytes
objdata_02_off000286ab.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x286AB 12297 bytes

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