Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3b066156c85c5e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 16:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 209a01bf1205e11e8b87e0f4b617fe49 SHA-1: 272035b7e530cd59bf858d7c9953e5317f89fbaa SHA-256: 5b3b066156c85c5eb35a2567f74b250e7932bb7cc4c9f41b731a0660707be229
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generator / game hack' lures for popular games like Coin Master and Roblox. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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/406889139/coin-master-free-spins-and-coins-link-haktuts-game-hack In PDF document text
    • http://educhina.mn/editor/files/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/cheats-and-codes-for-roblox-for-pc_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-promo-code-hacker_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-hacks-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://educhina.mn/editor/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/cheat-roblox-money-jailbreak_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/speed-hack-roblox-app_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://educhina.mn/editor/files/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE5 22472 bytes
SHA-256: ffcfb4df537dec0d1efc57ffd5cacdaae01ed8a1e4c35a3d8d63c896515509c5
font_01_sfnt_off000061d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D8 18656 bytes
SHA-256: 3e017b30533e4f5594d0ce20bcdebe9dbaf30d7e5f6e53e964d5ed5cfbcf7f01

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