Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e6e7c5a9dc572d…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 19:19:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0158e1fabb0ed88b01285596928cff0 SHA-1: f0931c1097231dc4f126eda8abf0b0e0728fc323 SHA-256: 78e6e7c5a9dc572d4d456f5c242250f248d41814a71a6e0c9deeba82a97d42a6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "Coin Master" and "Roblox" related hacks and generators. The primary lure appears to be a "free generator / game hack" which leads to the URL http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-game-hack. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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-spin-and-coin-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/tre-un-hacker-sur-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-printable-roblox-miniature-chocolate_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-games-and-free-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/boku-no-roblox-hack-cash_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-free-girl-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-roblox-fe-scripts-pastebin-july-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/games-with-free-radio-roblox_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_off00003163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3163 23076 bytes
SHA-256: c4b67a6632e86e47032146e6fe40a54ced4a9e9e5b9d501070e7bef09ac548f6
font_01_sfnt_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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