Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd755022c73893d1…

MALICIOUS

PDF

49.0 KB Created: 2021-06-11 08:53:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 178a225a21bb50c3aa8b013b7bbd9fa1 SHA-1: d8a25cedf33d00a3862263c3863961ce90ccf036 SHA-256: cd755022c73893d161d035bfcdcf87632181f26c6568b0d5243c0ff5e54e76a9
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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/roblox-afk-cheat-game-hack In PDF document text
    • https://www.sd-olimp.hr/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/tiktok-free-followers-2021_GM835599320.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-make-a-free-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/redeem-roblox-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
stream_004_off00005239.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5239 33436 bytes
SHA-256: 4266b3445fca357a754198feb261d8d551925879424863e4710fa3f34e921545
font_01_sfnt_off00009cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF6 18452 bytes
SHA-256: 4e6549bd34fd0a2ad1085808da6a4e72bc116333fec2fbd6e1f5287d127e2b4d

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