Malicious PDF — malware analysis report

Static analysis result for SHA-256 568c88040752cb56…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 00:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67606cc30a5e33d7cee6507016f99def SHA-1: dfec2f1450301f891ef7f85f298e1148f6214578 SHA-256: 568c88040752cb565295a11653d55d543fda0e79668a1d4f0b5392242a89f6a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks. The primary link directs to 'netcdn.tw', a known malicious redirector. The document body and embedded URLs reinforce this theme by referencing game-related terms like 'Coin Master' and 'Robux', further supporting the lure. No scripts were extracted, but the presence of malicious links and the lure theme strongly suggest a phishing or scam attempt.

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-app-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-android-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-btools-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/all-free-roblox-hats_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-hack-somones-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/fake-free-robux-gui-troll_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-how-to-get-a-hacked-account-back_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/javascript-free-robux_GM431946152.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_off000030f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F7 22232 bytes
SHA-256: d9adb7421db9f44b9cf92cec89cc3c5757cec9c86dfc7fd2cca89c087e2b14a7
font_01_sfnt_off00006262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 18008 bytes
SHA-256: 400bd01aeeee29512dc5c2a015b8ac58bc02acb7abc216a5ca07a898c149c10b

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