Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89b204161b40f92…

MALICIOUS

PDF

40.1 KB Created: 2021-04-23 11:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5e5ad2a3f20b3d009d88b7316c356d27 SHA-1: 2e7eb092b30f055db5a3e6fb88fc023f328c8e2b SHA-256: d89b204161b40f924d7f1992cc1ec1d6ac6541407e55f9149f653f66f2ae2f3f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Roblox Hub Free Robux' and game hacks, directing users to a malicious URL. This is a common social engineering tactic to entice users into clicking on malicious links. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.top/app/431946152/roblox-hub-free-robux-game-hack PDF link annotation
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hack-highter-rank-in-group.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/good-scripts-roblox-cheat.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-hack-a-roblox-account-using-cookies.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-rocitizens-codes-for-free-items.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/how-to-get-clohes-for-free-o-roblox.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/pastebin-roblox-hack.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-roblox-accounts-that-work-100.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-cruise-ship-tycoon-cheats.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-hack-unlimited-money-pc.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/are-games-on-roblox-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_off0000418f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x418F 25012 bytes
SHA-256: 08ba03c7164a924592a7f08d2972e916524599c3717cfcd01749bd13d8f9ee72
font_01_sfnt_off00007b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6C 18088 bytes
SHA-256: 1a7e942fe5839f7c10c65652a1d77af52bb1e780096145256507a044cfc34c06

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