Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09330c7b76ecfe8…

MALICIOUS

PDF

33.0 KB Created: 2021-06-26 03:18:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d76eecf4fb09cc51cfffb0a8d5a89886 SHA-1: 65908c42fc2bf2a81337dcbfae1d525c5371e8fb SHA-256: d09330c7b76ecfe846bab187228f7a4bef5334e889191cce557e23990ff38951
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free scripts for Roblox Studio' and a direct link to a suspicious URL. This heuristic, combined with the ML classifier flagging the PDF as malicious, indicates a phishing or malware distribution attempt. The document body and embedded URLs reinforce the theme of game hacks, suggesting a social engineering tactic to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.co/app/431946152/free-scripts-for-roblox-studio-game-hack PDF link annotation
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/agast-2021-hacks-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/headphones-free-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/me-hackearon-la-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/avatar-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/easy-robux-today-for-free_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/hacker-decal-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/hack-de-invisibilidad-mega-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/hacked-face-roblox-id_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/roblox-exploit-hack-full-lua-overpowered-commands_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/application-pour-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/how-to-fix-a-hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/cheap-robux-scam-free_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/get-20212021202120212021202100-free-robux_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/free-roblox-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/deep-chills-run-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/free-5-million-robux_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/free-hair-roblox-not-moel_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/how-to-make-a-fake-free-robux-pop-up-roblox_GM431946152.pdfIn PDF document text
    • https://apply.skubi.eu.org/wp-content/uploads/fsqm-files/counter-blocks-roblox-offensive-hacks-unknowncheats_GM431946152.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
font_00_sfnt_off00002b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B47 21776 bytes
SHA-256: 3331d0c87e189aed61842cc09c922f41c00e2d03bc33a6c7877f5afadc419731
font_01_sfnt_off00005b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 19364 bytes
SHA-256: b69f1fea68d4fb0d92ffc2a2d5aa993a3e9224e3e1b95fc355daeaf4d7d58d5d

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