RTF malware analysis — malicious · e300f06c912da0fa

MALICIOUS

RTF

495.6 KB Created: 2019-03-06 15:32:00

MD5: 8f27bdfb47a1c7eb49560b2c83fda9e4 SHA-1: c23700bb9f39852d4f1da77961d769ffa4e58ca7 SHA-256: e300f06c912da0fa80d629c1a71f604583fe31f5b5ae420eac13f887c11e8299

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects with ` objdata` sections, and a ` objupdate` directive that forces OLE activation. This strongly suggests an attempt to exploit a vulnerability related to OLE object handling to execute embedded code. The presence of `EXTRACTED_FILE_STATIC_TRIAGE` with signals for VBA auto-execution further supports this. No specific family could be identified, and no external IOCs were extracted.

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.
Suspicious extracted artifact high 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.

URL http://schemas.microsoft.com/office/word/2003/wordml
OLE object data medium RTF_OBJDATA

RTF contains 4 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000291c.bin` `239970ab91b3f4f53abf63f601d4df7ac4d58066117e5f3c752370c1dfd53196`	rtf-objdata-decoded	RTF \objdata at offset 0x291C	46638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_01_off0001f097.bin` `6a40295533994f27510f44defcaad126e85b9ded1ba657628bae47abc9ac0def`	rtf-objdata-decoded	RTF \objdata at offset 0x1F097	46638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_02_off0003b812.bin` `f2c4f4c5de96d5136276361ae88ed730e8da80428280cd0cfcdd1772d73b6df4`	rtf-objdata-decoded	RTF \objdata at offset 0x3B812	46638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`objdata_03_off00057f8d.bin` `70d1619d26fc16f5b362e0df6128518204c190416181a7f57b3738acbac94197`	rtf-objdata-decoded	RTF \objdata at offset 0x57F8D	46638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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