Malicious PDF — malware analysis report

Static analysis result for SHA-256 474698e19cb74e97…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 16:23:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fde2d767e3ed8a067b971df44c71709a SHA-1: 9a2c09edfa9917eba62bfec983606b4f08925c47 SHA-256: 474698e19cb74e972abc618a39ad7e4a50122a250a69d93044153df453257a23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on offers for free Robux or game hacks. The primary link, http://netcdn.tw/app/431946152/hey-google-how-do-you-get-free-robux-game-hack, is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/hey-google-how-do-you-get-free-robux-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-with-email_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-scripts-admin_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-name-script-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-roblox-http-catchsatoshionline-robuxrobloxg_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-server-side-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-page-demo_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-a-roblox-account-to-show-peoples_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack_GM406889139.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_off00003149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3149 21976 bytes
SHA-256: 0a92b854b20dbf0e77a0637fb52e802a1c75ccb4b1af6705ea7142f80b55afd4
font_01_sfnt_off000061e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 19568 bytes
SHA-256: c947cb9e4153dfb2ea198cd701ec4d5f338e29feb7802fd2debd87897cec7901

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