Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 ad8e6098187545ab…

MALICIOUS

RTF / .DOC

499.5 KB Created: 2019-09-17 13:59:00
MD5: cd8c46669e5b85f7774f5f620b6163f4 SHA-1: 6910224f77a516e76f67d49cb07efb6e1598d019 SHA-256: ad8e6098187545ab470f7b2c52c587d1706152a91eb030d681b901f000508224
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains embedded OLE objects and uses an objupdate heuristic, indicating an attempt to automatically activate and execute embedded content. While the document body is heavily obfuscated and unreadable, the presence of these OLE objects strongly suggests a malicious intent, likely to download and execute a secondary payload or exploit a vulnerability. The embedded URL is benign, but the overall structure points to a classic OLE-based attack.

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 1 \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/2{\1\s\s\s\s

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0006e73b.bin
71cacfebbed8f60f6728a3d29e5dc76b5d7359b80af59d38a1e1e32c7953e244
rtf-objdata-decoded RTF \objdata at offset 0x6E73B 3732 bytes