Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e39636ced85a74b…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 00:09:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 5aa84ad2f272a90d3343375390b758c7 SHA-1: eb210a595331a6530c1b3912ad40eca5c4683559 SHA-256: 4e39636ced85a74b6d254af005166f79046d792259845d92d638bb6a1e38ad5a
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/how-to-get-stuff-on-roblox-for-free-2021-game-hack In PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-do-you-speed-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/bighead-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-spins-coin-master-app_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_off00005205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5205 28608 bytes
SHA-256: abcea7b6d3ef1666317ee6b39e7149e117bc551e0a905a8720cd4de1af3f204e
font_01_sfnt_off0000932f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932F 18756 bytes
SHA-256: 194ad1e92d341775a837493267354e15914fe8fc618c4313722d170fa9dc266e