RTF malware analysis — malicious · 5276da8ab9ad886d

MALICIOUS

RTF

864.7 KB Created: 2020-04-20 08:08:00

MD5: 40eb1048172d7c0e616b62f19145e624 SHA-1: d4928779cdf9ead907f6db5f649b18395a95f24f SHA-256: 5276da8ab9ad886d3fc4421b19beefd9b9633ffb912e3b252e90aba3471b1395

80 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF file contains multiple embedded OLE objects, with the \objupdate directive indicating an attempt to force activation. This strongly suggests an exploit targeting RTF parsing vulnerabilities to execute embedded content. While no specific payload or script was directly extracted, the presence of multiple OLE objects and the objupdate heuristic point towards a delivery mechanism for a secondary exploit or payload. The document body consists of font information, providing no user-facing lure.

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 12 \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

Extracted artifacts 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00002cae.bin` `ad247d03182c4e654917d810656d38afa2290bac25f487386e99d7bd4b9dd63f`	rtf-objdata-decoded	RTF \objdata at offset 0x2CAE	22075 bytes
`objdata_01_off00013e64.bin` `50a74247e1a365925d5792a2f233c430ef5b7b8c8c98f8424294aa55f818dce2`	rtf-objdata-decoded	RTF \objdata at offset 0x13E64	22075 bytes
`objdata_02_off00025125.bin` `c432b2d2f63fb8a7b06a1c9b6fe2743e1dc7680ace07d10c7505dffaf5f7848a`	rtf-objdata-decoded	RTF \objdata at offset 0x25125	22075 bytes
`objdata_03_off000363e6.bin` `0ecba64855b79491b929c2bb5417895d5229d2786ddee36e5573f4e161ff79cc`	rtf-objdata-decoded	RTF \objdata at offset 0x363E6	22075 bytes
`objdata_04_off000476a7.bin` `b56086db888b914b53a708bbc942618c6c35b35e65d18afef03da3c0a7beb933`	rtf-objdata-decoded	RTF \objdata at offset 0x476A7	22075 bytes
`objdata_05_off00058968.bin` `c2562c3b98286be451795b0fbbdae59ac8d1de9c4836ba5cafaf4c8cc6779ac8`	rtf-objdata-decoded	RTF \objdata at offset 0x58968	22075 bytes
`objdata_06_off00069c29.bin` `d61fb18ede1d908b2e608776d00443d1d6f4202f3c4f6ea23efffe96e5709068`	rtf-objdata-decoded	RTF \objdata at offset 0x69C29	22075 bytes
`objdata_07_off0007aeea.bin` `462e0041dc188e1eec0696cd0a7ecad0164dd9f6868b45bcc131fff00454f02d`	rtf-objdata-decoded	RTF \objdata at offset 0x7AEEA	22075 bytes
`objdata_08_off0008c1ab.bin` `5d5557f67e3a8761a0d928dc55a294d593267d90cf48842d6ca41e32c4d18c2f`	rtf-objdata-decoded	RTF \objdata at offset 0x8C1AB	22075 bytes
`objdata_09_off0009d46c.bin` `db9413c034d8f393e5147d0077d23db74bbe62581d10965c9659e6c64f28be29`	rtf-objdata-decoded	RTF \objdata at offset 0x9D46C	22075 bytes
`objdata_10_off000ae72d.bin` `3fab5db665ff442816c677c6d65687f3d784d8fc14509d717f33488a7c69c971`	rtf-objdata-decoded	RTF \objdata at offset 0xAE72D	22075 bytes
`objdata_11_off000bf9ee.bin` `474cfb34f9072c5968cbccbb429c4be68a65494c32c49415372b5f93b5e75fa4`	rtf-objdata-decoded	RTF \objdata at offset 0xBF9EE	22075 bytes

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