Malicious PDF — malware analysis report

Static analysis result for SHA-256 db33804fe2545723…

MALICIOUS

PDF

41.6 KB Created: 2021-04-28 07:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 72b9cbede8f4a0ca072e1442ca42e2d7 SHA-1: ad42290ec1026566d226bd1270104e84e6987e7f SHA-256: db33804fe2545723749cfd756623952ef92bb991eec4c751ddf556c78a53c799
82 Risk Score

Malware Insights

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

The document uses a social engineering lure, promising free Robux, to trick the user into clicking a link. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common method for malware delivery. The embedded URL and numerous other URLs point to potentially malicious content, suggesting a download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.xyz/app/431946152/get-free-robux-fast-and-easy-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-robux-codes-list-pastebin.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-cheat-on-you-roblox-girlfriend.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/friv-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-place-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-adopt-me.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-robux-legit-with-proof.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/babe-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/get-free-robux-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-cheat-engine-wall-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/25k-robux-free.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000431c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x431C 26836 bytes
SHA-256: 1d88492ddad43ae6ad902565d1f722f4af08161167cc0f0c1ec367c0b9185d3a
font_01_sfnt_off00007f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 18700 bytes
SHA-256: c82ec9fc067a464ebacd1817fa2878461612751d26a8eef57ef473b7511ec084

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