Malicious PDF — malware analysis report

Static analysis result for SHA-256 1916435ccaf847cd…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 23:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 04c1f32c2b44c386f468c5b3dfa52504 SHA-1: 10ce938ea62d5d7bb4a66215c864815ad490c200 SHA-256: 1916435ccaf847cdd19427bc8070383d425c17f0d87269d1623115c0da0742ff
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coin-master-spins-and-coins-game-hack In PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.library.smactf.sch.id/repository/how-to-get-infinite-robux_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
stream_003_off00004a3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3A 25240 bytes
SHA-256: d5d2f9f434b29b86cf52ef25328b7b7019de9188ed823fd3965a40c91b2f2a36
font_01_sfnt_off000083ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AE 18060 bytes
SHA-256: 55f53c4f18bfaf59a8fbb6d381f980c96a3f4ad908aa3278e43a985984e68094