Malicious PDF — malware analysis report

Static analysis result for SHA-256 af21b31bc52b94d7…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 09:35:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 15f1b76f0cc54bd1161946383628c946 SHA-1: 84f4afb057fa61b4501129c0e1726427bcef18b1 SHA-256: af21b31bc52b94d773c2656710d001b87de4b9b0d7dd0c8d2e92ca3bcc45baf6
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/roblox-kazotsky-kick-script-pastebin-hack-game-hack In PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/pokemon-go-free-602_GM1094591345.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-robux-hack-free-robux-generator-uirbx-club_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/pokemon-go-free-coins-promo-code_GM1094591345.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-really-easy_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-giveaway-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/2021-no-human-verification-hack-for-coin-master_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_off00002bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BED 23268 bytes
SHA-256: 8db5be30a5f1d0599ecfb135c5b5e3bf696d9cc37d8f6eefa250ae6c8ecc44a4
font_01_sfnt_off00005f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F55 19472 bytes
SHA-256: d5fb9a1e14f6af1230456bfa23868f2166f79111ddc63130e482778bf8865e4b