Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbb96e6fe54ca94…

MALICIOUS

PDF

33.1 KB Created: 2021-06-19 21:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8f674f20c9d8c156caefcb0ea5e2f469 SHA-1: a45b3daf7ebf1f076f16ed0b631cb0f48994146e SHA-256: 3cbb96e6fe54ca9483cc53fb8c9f857a36ad3c29424e0cde3ebff60b94c90d31
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game-related items and hacks. The primary link, http://netcdn.co/app/431946152/free-run-animation-roblox-game-hack, is identified as a malicious redirector. The document's content 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.co/app/431946152/free-run-animation-roblox-game-hack In PDF document text
    • https://kldcardio.ru/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/hacks-to-g-et-into-houses-on-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/free-roblox-cheats-and-hacks_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-free-boy-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://kldcardio.ru/images/paypal-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/sharkblox-trash-gang-shirt-free-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/hair-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-genrator-app_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-tiktok-accounts-with-followers_GM835599320.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_off00002c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1A 21612 bytes
SHA-256: 915acb3203706c159a0a5ffc0aef7c527463b501c20a19429c84ae5f86acdc19
font_01_sfnt_off00005b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B89 19276 bytes
SHA-256: 722dd3e01c2d538a2b651ae5ec56fc5ee446016d2fcdced57b69b16a447303e2

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