Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3fc8fd0d624e68…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 03:15:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: c3f720cab900109d182f46ede2b149de SHA-1: c7879cf4e4cea859e697ad1365b5af19923e2187 SHA-256: 4e3fc8fd0d624e6823fc4424657e04aaca277657beb3ffb21b9f81590d906cc7
160 Risk Score

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/how-to-get-free-robux-on-ipad-game-hack In PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-get-robux-for-free-on-roblox-easy_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-hak-2021-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-free-gamepasse-script-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/cheat-bubble-gum-simulator-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/los-hacker-de-roblox-mas-peligrosos_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/how-to-hack-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.alamrayabali.com/assets/CKImages/files/robux-gift-card-free_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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22156 bytes
SHA-256: bcdf1ee34ed2ee00b2ff5218167c8d2f61143dad0b69dcaf78b6cf2c1015b9e8
font_01_sfnt_off000060cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CB 19336 bytes
SHA-256: 6d1966dedbfa40cd6f3b86a0165a8efd1ff1225966bd53f71ae3281b1191d4bc

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