Malicious PDF — malware analysis report

Static analysis result for SHA-256 3663446adfd30753…

MALICIOUS

PDF

35.3 KB Created: 2021-06-30 13:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e3dbbe8fe78543f30db33696630c2c5 SHA-1: 94e408ae9f098bd13de7954d115e871dce30a89e SHA-256: 3663446adfd30753640c0a4875116d2f64158fd308f581235d6eaef7b51ab42a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game hacks, specifically mentioning 'free Robux', and includes a critical heuristic firing for a malicious redirector link. The embedded URL http://netcdn.co/app/431946152/berby-novedades-free-robux-2021-game-hack is identified as malicious. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially harmful content.

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/berby-novedades-free-robux-2021-game-hack In PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-cheat-codes-rocitizens-november-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-robux-1-step_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-backdoor-hacking-roblox-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-fashion-frenzy-free-online-game_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-obc-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-free-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-roblox-strucid-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-group-admin-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-developer-console-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-into-roblox-accounts-using-a-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-robux-for-free-on-pc-windows-10_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-to-use-roblox-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-hack-on-robux-store_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-lumber-tycoon-2-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/jailbreak-money-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-minecraft-games-for-kids_GM479516143.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_off000031cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CB 22212 bytes
SHA-256: c3bca7a839dd7d05cb21bcafd8a98af8f9f04cc4cf87977a9dee2512a88f88ad
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 19588 bytes
SHA-256: e5d4821337f3cf17236c4333bbb3e12edd7436936eef34092c2f7b31ebe3dce6

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