Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5978ff3a7b7b9a…

MALICIOUS

PDF

145.2 KB Created: 2024-07-29 20:11:39 +05:00 Authoring application: Microsoft® OneNote® LTSC
MD5: 888950d42161f2f8d7158f8269eed57c SHA-1: f9591ce68845133c933e8e2894ad1de2c8833ab5 SHA-256: 9e5978ff3a7b7b9adca09ec3c19552f41fd34c90fe09d9c4db927d90bfc842c3
80 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The document also impersonates a cloud file-sharing service, a common lure for phishing attacks. The embedded script is the primary mechanism for delivering the malicious payload, likely leading to further compromise.

Heuristics 4

  • Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Suspicious extracted artifact medium 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 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.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000c40f.bin
700c67820de858e40d976fd4d26880bc6c636b7fb7ab9fadf122d4f2b4e4c49f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC40F 119836 bytes
embedded_pdf_script_0000c120.bin
0e6703e9485fc311a00ca13188a888086412da37134421d63bcf9e3f01cf3c94		 pdf-embedded-script PDF decompressed stream script payload at offset 0xC120 1763 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 1 long base64-like blob(s).

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