RTF / .DOC malware analysis — malicious · e6c455dc101e7da8

MALICIOUS

RTF / .DOC

386.4 KB

MD5: 0944f85f0416a114c886f133ae0c1ef8 SHA-1: a9637e3521a8eb6e520f783997ef07a1f017655a SHA-256: e6c455dc101e7da8b1fe10f365f3a27baf4874906c8331c8d34351865d002d4b

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of objdata and objupdate to force OLE activation. This suggests the document is designed to exploit OLE object handling to execute embedded code. The extracted artifacts, objdata_00_off000007d1.bin, objdata_01_off00032bb4.bin, and objdata_02_off00034157.bin, are likely components of this exploit chain, potentially leading to the download and execution of a second-stage payload.

Heuristics 5

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
\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 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Suspicious extracted artifact medium 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007d1.bin` `ce8a04b7ad2bf329cb1d2c8577ae10e66786eec45246073a599bb8e4a4ad3e0c`	rtf-objdata-decoded	RTF \objdata at offset 0x7D1	98865 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00032bb4.bin` `7a8598fff434e2b582d3d87e32bb1d356d28f288618d4b03cf39e56767823039`	rtf-objdata-decoded	RTF \objdata at offset 0x32BB4	2632 bytes
`objdata_02_off00034157.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x34157	12297 bytes

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