Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3b283fedb486aa1c…

MALICIOUS

Office (OLE)

112.1 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: 7d97fd70f28ded26ea2448669651e562 SHA-1: 0d154542491951300bba1cd50efbc0e0d90857e4 SHA-256: 3b283fedb486aa1cf6e2f0df630be8c383214a41f87464e2700ef07542b3c32b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell

The sample is an OLE document with a significant amount of slack space, indicating potential obfuscation or embedded content. High-severity heuristics indicate suspicious cmd.exe invocation and PEB access, suggesting an attempt to execute commands and potentially evade detection. The embedded URLs, although some are confirmed benign, point to a suspicious domain, which could be used for payload delivery.

Heuristics 4

  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 114,750 bytes but its declared streams total only 24,565 bytes — 90,185 bytes (79%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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://www.pdf-repair.com
    • http://www.pdf-repair.com)/Producer(Advanced
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

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