Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8d2fa31d5e2a1e…

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 01:42:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: d88e99c68d3385db5a8b9e8e5e2ae682 SHA-1: 2ebac39d80a473b826fcc37c75299f71c88b61ee SHA-256: 5d8d2fa31d5e2a1e85d094e3d23fccc0eefea9a4797f3844a204fe6b1b07ddec
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/coin-master-hack-2021-download-game-hack In PDF document text
    • http://kovroff.com.ua/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/make-robux_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/minecraft_GM479516143.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/coin-master-game_GM406889139.pdfIn PDF document text
    • http://kovroff.com.ua/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://kovroff.com.ua/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004817.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4817 24512 bytes
SHA-256: f7e49b96565e0688b3a4d50eed1e6f09f31a1b0679e57fb143dfc88e5fb02fe5
font_01_sfnt_off0000805d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805D 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3B 18696 bytes
SHA-256: 01e33fa384fcd9559826a4aa1de189e20085b3e2fa6b70097625b29721cffd1e

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