Doc.Dropper.Agent-7111893-0 — RTF malware analysis

Static analysis result for SHA-256 7f3c34bfee78fa87…

MALICIOUS

RTF

1.33 MB Created: 2019-08-08 22:32:00 First seen: 2021-10-16
MD5: 401de209d7b6ed29001e21ed64944e43 SHA-1: a9f6fce6bed922f9c7ef4a1b57ad957660dcf2b4 SHA-256: 7f3c34bfee78fa87b1e1e951a73c2047bd0bc487ad4f79d71543b1c955caa6cd
262 Risk Score

Malware Insights

Doc.Dropper.Agent-7111893-0 · confidence 95%

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

The RTF file contains numerous embedded OLE objects with excessive hex-encoded data, indicative of a hidden payload. The critical heuristic firing for CVE-2017-8759 confirms exploitation of this vulnerability for OLE activation. ClamAV detection as 'Doc.Dropper.Agent-7111893-0' further supports its role as a dropper. The embedded URL, though benign, is present within the RTF body.

Heuristics 8

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Doc.Dropper.Agent-7111893-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-7111893-0
  • \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 ~1034KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 15 \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.
  • 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 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003654.bin rtf-objdata-decoded RTF \objdata at offset 0x3654 33326 bytes
SHA-256: 5def73b65055038e0dc19479bda1d9181f4ae7ff7f30d6626f412fbe70dd12f0
objdata_01_off000194e7.bin rtf-objdata-decoded RTF \objdata at offset 0x194E7 33326 bytes
SHA-256: 9982553f396b00fe2ed044ce98451c2fa56468a2074a322bc4db872353ec80ae
objdata_02_off0002f37a.bin rtf-objdata-decoded RTF \objdata at offset 0x2F37A 33326 bytes
SHA-256: be67c20b6993088179d6a8b0f9556b8cf84a338b3411540e65034ab958c77ead
objdata_03_off0004520d.bin rtf-objdata-decoded RTF \objdata at offset 0x4520D 33326 bytes
SHA-256: 2451e4c5399fd63c0ba275a2c481d4c6314bb2c051b1166c7387ae4d438d6169
objdata_04_off0005b0a0.bin rtf-objdata-decoded RTF \objdata at offset 0x5B0A0 33326 bytes
SHA-256: d92370d02deb81c2d74f6569620879e7d5cf58078a0f922e2fa96e77082e5e58
objdata_05_off00070f33.bin rtf-objdata-decoded RTF \objdata at offset 0x70F33 33326 bytes
SHA-256: afe9da505a5265c8aa0f81fa3fed4ae2e2c7d6e373443ab7e42697faf7c19920
objdata_06_off00086dc6.bin rtf-objdata-decoded RTF \objdata at offset 0x86DC6 33326 bytes
SHA-256: 9a82727fb8918611f9a98f2cf96313a5752b22f30acd23b1265e9ffbe211eafb
objdata_07_off0009cc59.bin rtf-objdata-decoded RTF \objdata at offset 0x9CC59 33326 bytes
SHA-256: 035c326718bd9ed3d1d1481872f4e93a274792290a90449b3fa17fa1f1d0d2cd
objdata_08_off000b2aec.bin rtf-objdata-decoded RTF \objdata at offset 0xB2AEC 33326 bytes
SHA-256: 647f1c9d4be01654b4dfea4e5611fb25b5235bb22def8f3fbd260658cb57c363
objdata_09_off000c897f.bin rtf-objdata-decoded RTF \objdata at offset 0xC897F 33326 bytes
SHA-256: 82ec09e0c162ddc98b56eb6c9fdb76e66f9a16cd74defd7cc28bac410febe33d
objdata_10_off000de812.bin rtf-objdata-decoded RTF \objdata at offset 0xDE812 33326 bytes
SHA-256: 10104ae63ba754cef668d5b828ffe366898db7afdb52f6cb0184ceefab57c2e9
objdata_11_off000f46a5.bin rtf-objdata-decoded RTF \objdata at offset 0xF46A5 33326 bytes
SHA-256: 1ac42b7402f3f2dcbc3da9c38b334b02e8057111d143ec8b5fa3fd4c549bae88
objdata_12_off0010a538.bin rtf-objdata-decoded RTF \objdata at offset 0x10A538 33326 bytes
SHA-256: 26e5c723f0e7e3e0a888029bc10a846d933843e1601dacab0ac56e081bd4d08b
objdata_13_off001203cb.bin rtf-objdata-decoded RTF \objdata at offset 0x1203CB 33326 bytes
SHA-256: d92950d677d232b8caffd3d101f1fdad22a7135838cef687d4b1a5c5e150a115
objdata_14_off0013625e.bin rtf-objdata-decoded RTF \objdata at offset 0x13625E 33326 bytes
SHA-256: eb8ea164d39fccf22f62a9f2aee21e4844d71b1ffb00e257bce70ccca50f0d73

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