Malicious RTF — malware analysis report

Static analysis result for SHA-256 ef2ab11500fcfe5b…

MALICIOUS

RTF

533.0 KB First seen: 2024-08-14
MD5: 3ae1fe6fbfac558bccdfc00e345a5963 SHA-1: 7fa3c294ada0d8089ffa9f3c64ca9e11c4c1ee72 SHA-256: ef2ab11500fcfe5b861b8421b2fcff037dfd33dfc314558be34d2ba46b485611
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1059 Command and Scripting Interpreter

The RTF file contains embedded OLE objects, and a heuristic indicates that \objupdate forces OLE activation. The document body presents a lure related to financial audits, instructing the user to 'Enable editing' and likely macros. This combination suggests the document is designed to trick the user into activating the embedded OLE object, which is likely malicious.

Heuristics 4

  • \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 1 \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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00045c26.bin
f0481e421160b9e89c5e9877129bb613f73d985f136c404ae6e4a43e909475b1		 rtf-objdata-decoded RTF \objdata at offset 0x45C26 1523 bytes

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