Malicious PDF — malware analysis report

Static analysis result for SHA-256 011acd1e37215dd8…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 09:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-28
MD5: 5d3705980f0bff65b8aa1555e47fe1cf SHA-1: 54b2c94de3e62d9b4efff6e920e48bf808ed87ca SHA-256: 011acd1e37215dd85ad63c1a0f58c7ff90e8297c0ea9908013a7c8ab7dcb8e17
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/hack-script-for-one-piece-legendary-roblox-copy-and-paste-game-hack.
  • 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/hack-script-for-one-piece-legendary-roblox-copy-and-paste-game-hack In PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/area-47-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-cheat-engine-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/use-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-injector_GM431946152.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-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-booga-booga-cheats_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-hair-roblox-code_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/gift-card-robux-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-lego-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-cheat-engine-crashes_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (stream_004_off00004f9b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9B 24968 bytes
SHA-256: 0b933b61d9a1ef21b4a2ad5d2b6bb70c5636bdac5d6820ecd6494085244016b8
font_01_sfnt_off0000893f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893F 19544 bytes
SHA-256: 10f3afeae9509fc4c2e19c290341c070bfd3d6972abe68e041148f583ba34db6