Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7d5ff4b0431716…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 10:03:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6932c2c07d8f0e38193ead31dd73c472 SHA-1: 45da5ce45ed12ec820d862c0c1615d9c942412b2 SHA-256: fe7d5ff4b04317166ef56fd31357615c4b88d742e6f639f6900c00c938bf3ec2
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. It also displays a fake CAPTCHA, a common tactic to trick users into interacting with malicious content. The primary URL identified is http://netcdn.tw/app/431946152/give-me-free-robux-game-hack, which likely serves as a redirector to a malicious site or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/give-me-free-robux-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-robux-robux-obby_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/zephplayz-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/is-tiktok-pro-free_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/70-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/games-on-roblox-that-will-give-u-free-hat-youtubecom_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-today-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-september-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-para-conseguir-dientes-gratis-en-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-promo-codes-robux-hack_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_off000031b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B2 22564 bytes
SHA-256: 834c92ef98a8d4d27fc25703711eb52257617166f2820996c203ddaba28f7333
font_01_sfnt_off0000645f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645F 19144 bytes
SHA-256: 49caa2a42633a23caf301bb0fa3c0edf25e4e3c2cd040ebd05f96fd152ca8770

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