Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 27ef7f1d02d9b325…

MALICIOUS

RTF / .DOC

536.4 KB
MD5: 9aa5f8fe9b7d122683c5666a78e02b33 SHA-1: c9cfa3a01834f9eddaa340ded0da238f13b0b1a2 SHA-256: 27ef7f1d02d9b3252a1bd26f119e8f572d183a9e440f8cbe856b8ec4aee3cfd6
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 one specifically configured for automatic linking and updating. This technique is commonly used to trick users into enabling content execution, which then likely triggers the embedded object to run. The heuristic 'SE_ENABLE_LURE' further suggests the document contains instructions to enable macros or editing, reinforcing the 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_off00000bb0.bin
d9ef1d864a22a3ecbbb9dc6a67ba4207662a60569f4179b8a3383f6205eeee48		 rtf-objdata-decoded RTF \objdata at offset 0xBB0 171550 bytes
objdata_01_off00057e29.bin
9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470		 rtf-objdata-decoded RTF \objdata at offset 0x57E29 2632 bytes
objdata_02_off000593cc.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x593CC 12297 bytes

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