Rtf.Dropper.Agent-9965975-1 — RTF malware analysis

Static analysis result for SHA-256 8326bcb300389a2d…

MALICIOUS

RTF

3.06 MB Created: 2018-10-09 09:05:00 First seen: 2019-11-20
MD5: 7296d52e0713f4bf15cd4e80ef0da37e SHA-1: 7663ae93af3c9058649e91d8704309a1ce86c5d3 SHA-256: 8326bcb300389a2d654e6e921e259e553f33f8949984c2da55ccb6e9ed3f6480
324 Risk Score

Malware Insights

Rtf.Dropper.Agent-9965975-1 · confidence 95%

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

The RTF file contains multiple indicators of malicious activity, including embedded OLE objects and large hex-encoded data blocks. Critical heuristics identify an Equation Editor vulnerability (RTF_EQUATION_EDITOR) and a PE header within the hex data (RTF_MZ_HEX), strongly suggesting exploitation for client execution. The ClamAV detection name 'Rtf.Dropper.Agent-9965975-1' further supports this, indicating the file acts as a dropper for a secondary payload.

Heuristics 10

  • Equation Editor CLSID critical CVE likely 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.Dropper.Agent-9965975-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Dropper.Agent-9965975-1
  • PE header (with DOS stub) in hex data critical RTF_MZ_HEX
    Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
  • \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 ~1134KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 9 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • Suspicious extracted artifact info 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.
  • 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.openxmlformats.org/drawingml/2006/main In RTF body

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000ff12.bin rtf-objdata-decoded RTF \objdata at offset 0xFF12 390702 bytes
SHA-256: 2a7f92bf37cef77c4fa2e97fcf3478b3e4e4296514817bd8c12e58300b485406
objdata_01_off00132a95.bin rtf-objdata-decoded RTF \objdata at offset 0x132A95 390190 bytes
SHA-256: f8ac5b37f52b6316178c293704fcc762d0a29d2700c7eda53724f552413c7b98
objdata_02_off002a921b.bin rtf-objdata-decoded RTF \objdata at offset 0x2A921B 61350 bytes
SHA-256: 9351796084e39af52c68d6e6da5d183ce3c1b62562559d2afc72905c03cd4f55
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.78, consistent with packed or encrypted content.
objdata_03_off00301413.bin rtf-objdata-decoded RTF \objdata at offset 0x301413 4902 bytes
SHA-256: 28c9afbe46a35a6d7115ca3da535854efddc9749f1ff13722fa98d2bd3a8122b
objdata_04_off00303f9e.bin rtf-objdata-decoded RTF \objdata at offset 0x303F9E 5926 bytes
SHA-256: 5b5850f3217e8465d6add2da18a495d87d33552c6c8f400e52e5ab9cf06ba2e9
objdata_05_off00307336.bin rtf-objdata-decoded RTF \objdata at offset 0x307336 7880 bytes
SHA-256: 684a9c7e0f65a37724dd1bc6c60e9162206bebc91b6be624b6ad35df95386bad
objdata_06_off0030b786.bin rtf-objdata-decoded RTF \objdata at offset 0x30B786 7863 bytes
SHA-256: 2aafe415dcd9eedce5c0d8c5612fb07ac41f72f66d44b5b8d49301005d8ecb01

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