Malicious RTF — malware analysis report

Static analysis result for SHA-256 0ffadab1c390082e…

MALICIOUS

RTF

1.05 MB Created: 2019-09-17 13:59:00 First seen: 2020-12-25
MD5: 110dffcb233e4bcf0304e331d7f8465f SHA-1: cbc2fa6b21ba1fe4781e79e6c4194f478406bf1f SHA-256: 0ffadab1c390082e94124aadaee9e36bc1a8fb272493cfe2137e1c98ba17b87f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF file contains embedded OLE objects and uses objupdate directives, indicating an attempt to exploit client-side vulnerabilities for execution. While no specific script was extracted, the presence of embedded OLE objects and the RTF format strongly suggests a malicious document designed to execute code upon opening. The embedded URL, though benign, is noted as part of the document's structure.

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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00108399.bin rtf-objdata-decoded RTF \objdata at offset 0x108399 1435 bytes
SHA-256: 06be64a7674c16315fc1958a6795c510208e146cb974bc651c716e6518eebb7b

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