Malicious PDF — malware analysis report

Static analysis result for SHA-256 33821bc86ab4d8cf…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 06:30:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 888d737283050fc784a4ed89848d5864 SHA-1: 6d6bf4c46652d2087f1315bf340f820b59052b1a SHA-256: 33821bc86ab4d8cf4fa075be61dca4fe69bc681a5057b3c67a3180affbf3999e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and items. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-pin-codes-game-hack, which is designed to trick users into clicking through to potentially harmful content. The document body and embedded URLs reinforce this lure, aiming to exploit user interest in free in-game currency or cheats.

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/free-robux-pin-codes-game-hack In PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-easy_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-rs-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/robux-hacks-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/auxzify-roblox-hack-abstract-v4_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-fb_GM406889139.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_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22460 bytes
SHA-256: eb58e6eecee5ce8512554e27039c17d2f0f1a4f827863847daf4be56c661af06
font_01_sfnt_off00006367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6367 19164 bytes
SHA-256: b916e76fe98bff6fd0474f051ff5e3faedde5306faa8896ed70e0070047acaf1

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