Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 e173845977339c3f…

MALICIOUS

RTF / .DOC

229.2 KB
MD5: ce7cc2464827f79e9d51810890cba926 SHA-1: aa727a33ca7042b76180cb26af402162343ca6b0 SHA-256: e173845977339c3fd7e017ecd1af96b4c0ce59fcb2001a683fff639c4ba824d8
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The sample is an RTF document containing multiple embedded OLE objects, with high-confidence heuristics indicating automatic linking and update triggers designed to activate the embedded content. This strongly suggests a lure to bypass security controls and execute a payload. The SE_ENABLE_LURE heuristic further supports this, indicating the document likely prompts the user to enable content. Without a document body or script content, the exact payload delivery mechanism remains unclear, but the OLE object activation is the primary attack vector.

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_off00000965.bin
46b48ba7e8f796b43c65e87365bb8aa17968eba4cd06ff6e1cc7275411a3f021		 rtf-objdata-decoded RTF \objdata at offset 0x965 20571 bytes
objdata_01_off0000b12a.bin
1af484323aa51f0bc067b498458ed2106db428c7b743185ac9a6e18e7b648e31		 rtf-objdata-decoded RTF \objdata at offset 0xB12A 2632 bytes
objdata_02_off0000c6cd.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0xC6CD 12297 bytes

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