Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ff139566c95a89…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 09:13:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9bb105cf9156206299a4e2ce82cd671d SHA-1: 7e92cae5bf19d5cb432a2dd145ebcfb6978bad4a SHA-256: f6ff139566c95a895ca2ad9882c83a0ff0bc34c68368c4796476dc22138d41be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency generators to trick users into clicking malicious links. The embedded URLs, such as 'https://netcdn.tw/app/431946152/roblox-free-level-6-and-level-7-injectors-game-hack', lead to known malicious redirector infrastructure. The document body and heuristics strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-free-level-6-and-level-7-injectors-game-hack In PDF document text
    • http://www.zdravazena.sk/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-tiktok-views_GM835599320.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-use-free-gamepass-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-hack-app-cheat_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-hack-generator-robux-gratuit_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-codes-2021-not-used_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_off00005233.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5233 24680 bytes
SHA-256: 51309dd0ffed4447578469a07d3376e18ed85a7f46266da4cdf8716eb8235482
font_01_sfnt_off00008a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4C 18752 bytes
SHA-256: de90d30f9f06227221dbf2a9e7e952b47014418c5260a4c079befe2c6b2103bf

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