Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 08b07466989febaa…

MALICIOUS

RTF / .DOC

384.6 KB
MD5: 2bc84b48e32b411a8e658b7a628e8985 SHA-1: 93afe95510421c2c65c015a11848c30f8d6ecf9b SHA-256: 08b07466989febaa045115c9f6e012fd56671331bcf1da828af8971a8590b76f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains OLE objects and triggers the CVE-2017-8570 vulnerability. This vulnerability is known to drop and execute a script, likely a second-stage payload. The embedded OLE object data and composite moniker indicators strongly suggest exploitation for client execution.

Heuristics 6

  • Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570
    RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • 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.
  • \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
  • Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000007d0.bin
da7bc912742c222e1eef172b743365b19523a8d62f8320ca2c562c140383cd77		 rtf-objdata-decoded RTF \objdata at offset 0x7D0 97957 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s).
objdata_01_off00032453.bin
c1062dbe2c516490ba03c091a3be0d514bef7428a936eb00367c1b3069f9cedc		 rtf-objdata-decoded RTF \objdata at offset 0x32453 2632 bytes
objdata_02_off000339f6.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x339F6 12297 bytes

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