Malicious PDF — malware analysis report

Static analysis result for SHA-256 7939a4c6501c3726…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 10:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 5573fd3c9bfa57f02de0b1cc26c8e234 SHA-1: 3d9694e06b964fc6f3842802b2a7f8e880c8e543 SHA-256: 7939a4c6501c3726a0e97a4f7c2aeeaf674806b3beb49e4fbe0bc0bb4dc352df
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/free-spin-coin-master-apk-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/how-to-fly-in-roblox-without-hacks_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-someones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-actually-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cheat-codes-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-jailbreak-hack-mod-menu_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/youtube-roblox-free-robux-without-downloads-legit-2021-urban420-network_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cheat-codes-for-roblox-legends-of-speed_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-welcome-to-bloxburg-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-one-piece-ocean-voyage-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-treasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-heads-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/brother-cheating-on-his-roblox-girlfriend_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_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 22964 bytes
SHA-256: 2332a5b61bdff0162d27b9d984a4c8d533d80a886f1b2b5d75e620dfc1a79742
font_01_sfnt_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 18344 bytes
SHA-256: 7d9887165ef16feadfba3a4a15f66fbc2523fe3814b25ea6526ef71165c50439

Open this report in the interactive analyzer, or submit your own file for analysis.