Malicious PDF — malware analysis report

Static analysis result for SHA-256 af24c33e5cc6f87d…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 06:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: cb255ac8b43bf2609797c5bb11f8b9f7 SHA-1: 8b5240ea888aa85ea413784f9f933d44f51d24a6 SHA-256: af24c33e5cc6f87d0a36bead55bb789c6b57a94aeb8c9197a216954d0a648c42
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/hack-roblox-robux-real-working-game-hack In PDF document text
    • https://amiranet.com.br/files/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/pokemon-go-free-joystick-hack_GM1094591345.pdfIn PDF document text
    • https://amiranet.com.br/files/files/flame-gg-hack-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox-robux-hack-pro_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-make-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_004_off00004f52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F52 28508 bytes
SHA-256: aa41fe64895010ecba30689227264aa29791064e63ac69c608b81b21454c4bbc
font_01_sfnt_off00008f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F70 18928 bytes
SHA-256: d0ac6d2c66eb5999835632d16681052305d7810d0ba9ba176c1b76a47c835d3e

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