Malicious PDF — malware analysis report

Static analysis result for SHA-256 af204ea0beb7d85a…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 07:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 679594ff1fb11b854bd7394b4af39f0e SHA-1: 7cc09b57ce858a3ee2a00ffc526eb22f772127a9 SHA-256: af204ea0beb7d85a082a862cfd05c5315eb85aef83345346a41ba5744176193e
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/406889139/coin-master-hack-2021-app-download-game-hack In PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/pokemon-go-free-100-iv_GM1094591345.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://www.fluidtecheng.com/uploaded_files/userfiles/files/coin-master-free-spins-instagram_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
stream_004_off0000535c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x535C 27508 bytes
SHA-256: d15eed3fa07c28dc9fe22d9abea5f3f3d0287cbe425e95855bd0e2b7688149bc
font_01_sfnt_off00009264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 18876 bytes
SHA-256: d7d40464d831938cfa9caec420339d0a09463e275fb7b32e55518fa26c88094b

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