Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 7b5572ae246bcd3f…

MALICIOUS

RTF / .DOC

535.8 KB
MD5: 84c45c2b0e94b8d1d064e739150ba84c SHA-1: f6a98ac4e50a89495626b5eaebb85d1116554faa SHA-256: 7b5572ae246bcd3f6ee0375e1e7a8c8d4287dae4ca1803d72ae427d8ecc93a32
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The RTF document contains multiple OLE objects, including automatically linked objects that are triggered to update. This technique, combined with the 'SE_ENABLE_LURE' heuristic, strongly suggests the document is designed to trick the user into enabling content or macros, which would then execute a malicious payload. No specific family could be identified, and no IOCs were directly extractable from the provided evidence.

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
be2553187f69da241ef2e7c2d6dadb3f499940005125b36742cab5157d09eec0		 rtf-objdata-decoded RTF \objdata at offset 0x969 171542 bytes
objdata_01_off00057bd0.bin
9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470		 rtf-objdata-decoded RTF \objdata at offset 0x57BD0 2632 bytes
objdata_02_off00059173.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x59173 12297 bytes

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