Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 89e09db84f9087b3…

MALICIOUS

Office (OOXML)

19.3 KB Created: 2017-01-24 14:48:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2020-07-02
MD5: a144714b3bae99d649a7f35a6937370a SHA-1: 1463ddb268c6c4b650612eeb5f751ac9caf6743e SHA-256: 89e09db84f9087b39f54ccadb09dad6a1ccf27359da375c55cab196f1af8a237
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1137.001 Office Application Build

The sample is an OOXML document containing an embedded OLE object. This object is flagged as a risky file that drops an auto-executable payload, specifically identified as a JavaScript file. The embedded URL http://ab.merlhumphreyphotography.com/stat.php?a=1&tag=mailchimp01&h= is likely used to download and execute this payload, indicating a spearphishing attachment attack pattern.

Heuristics 5

  • Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
  • 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.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Payload URL recovered from embedded OLE object (1 URL) info OOXML_EMBEDDED_OBJECT_URL
    An embedded OLE object (xl/word/ppt embeddings) carries a next-stage download URL in its Ole10Native/Package stream — stored literally (incl. UTF-16) or base64-encoded — which the package-level URL sweep does not see. Surfaced as an IOC; self-validating (only real payload hosts).
  • 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://ab.merlhumphreyphotography.com/stat.php?a=1&tag=mailchimp01&h= In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 5632 bytes
SHA-256: a215b6b9f7281d438562cf0752a992a737d4a58409ac35dacc3df3cfd22f0094
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): WScript.Echo(msg);}}
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 2795 bytes
SHA-256: 7abefccf04c64bff74d7dce3be5248229a575162706be3f2a103e0c9e79c0072
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): WScript.Echo(msg);}}
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5208 bytes
SHA-256: ebe66ec733a31bfb89c6088a5da8b48bf615e6bfc592410fcd2ac5da5a6e8dc6

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