Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 e11c652bd649d395…

MALICIOUS

RTF / .DOC

229.2 KB
MD5: 088a52692004cb72bcc8eaaea34e3c64 SHA-1: 6f8becc815af6d6b02eacadfcc623c7a139116b7 SHA-256: e11c652bd649d395127bfeff0a7732ef368342da2d40a4afbb56d0ae6e1d2029
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The RTF document contains multiple indicators of OLE object embedding and activation, including ".objdata", ".objemb", and ".objupdate" heuristics. The presence of a composite moniker and an auto-linked OLE object suggests an attempt to execute embedded code. The "SE_ENABLE_LURE" heuristic confirms the document instructs the user to enable macros or editing, a common tactic for malware droppers to bypass security measures. The exact payload and delivery mechanism are not discernible 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_off00000965.bin
0c54efac6712117d41b03e81830f2da39447511b6b0ce600e02de1a42af387a9		 rtf-objdata-decoded RTF \objdata at offset 0x965 20575 bytes
objdata_01_off0000b132.bin
1af484323aa51f0bc067b498458ed2106db428c7b743185ac9a6e18e7b648e31		 rtf-objdata-decoded RTF \objdata at offset 0xB132 2632 bytes
objdata_02_off0000c6d5.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0xC6D5 12297 bytes

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