Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5318751b75d8c615…

MALICIOUS

RTF / .DOC

1.93 MB
MD5: 19f919ed3b8b6a249822133f942127f9 SHA-1: ff6d551f5f01913f6e6e0832e5a706c1ace93c78 SHA-256: 5318751b75d8c6152d90bbbf2864558626783f497443d4be1a003b64bc2acbc2
320 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter

The file is an RTF document that contains embedded OLE object data, specifically triggering heuristics related to Equation Editor and OLE activation. ClamAV explicitly identifies this as Rtf.Exploit.CVE_2017_11882-6584355-1, indicating exploitation of the CVE-2017-11882 vulnerability. This vulnerability is known to be used for delivering malicious payloads, likely through the embedded OLE object.

Heuristics 8

  • 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.
  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • \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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~2024KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000aa.bin
65fe63dc9a55e283269fccb87f7c9ed7258f6feebe87e98344a217ef0618789f		 rtf-objdata-decoded RTF \objdata at offset 0xAA 1012304 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.