Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e679ff66ae44e3…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 16:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cbfa1bd638ae16c87271345df4a06d3b SHA-1: 7806205df5a05c601d510a134164c6776a1a1e97 SHA-256: c6e679ff66ae44e3e33c078c29e2e8867387d8a6f6bc7ef739189f10e482424e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as game hacks and free currency generators. The primary lure is the URL http://netcdn.tw/app/431946152/games-that-give-you-free-robux-game-hack, which is designed to lead users to potentially harmful content. The document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely to deliver further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/games-that-give-you-free-robux-game-hack In PDF document text
    • https://www.knjiznica-oroslavje.hr/files/all-vip-admin-commands-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-upload-audio-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-cheat-codes-for-dragon-ball-z-rage-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-hacks-jailbreak_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-play-roblox-games-that-cost-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-hack-codes_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
font_00_sfnt_off000030fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 22336 bytes
SHA-256: e87c9dac1b1341ef63eb03fe3df448391628b6a4c9ab66dfcd6fd601ece06221
font_01_sfnt_off000062dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 19644 bytes
SHA-256: f2ef61d464a1197aa82024f03da1d5af6fa3bd93677ebddf5a94754dddc021ec

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