Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 1a1980b9b571b820…

MALICIOUS

RTF / .DOC

536.4 KB
MD5: 8276e6661f29879a6295a9b9a21cffc7 SHA-1: 8f18330141cc98574a448d531cd7a3928c465214 SHA-256: 1a1980b9b571b820606c633f5af7d363597be942773ecafac8bf22b0439ffe9f
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 OLE objects, including automatically linked and updated objects, which are designed to activate embedded content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers. This points to an attack pattern focused on exploiting OLE object activation to deliver a secondary 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.
  • 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
1974a6439af2d7d1b9c33070178a60079c4150148af5b4c98a21a947bed920c1		 rtf-objdata-decoded RTF \objdata at offset 0xBB0 171558 bytes
objdata_01_off00057e39.bin
9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470		 rtf-objdata-decoded RTF \objdata at offset 0x57E39 2632 bytes
objdata_02_off000593dc.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x593DC 12297 bytes

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