Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b129c8680f1ae30…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 09:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9a0257c9c0c064ec65dc40ff9b9c94c4 SHA-1: c7f1c7aca42f5154a01d6b25847c752419f789aa SHA-256: 6b129c8680f1ae307bb26533a07a1f486773cddf040d7c18caed866c9e3a79af
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to a known malicious redirector infrastructure, specifically designed to lure users with promises of game hacks and free in-game currency for games like Roblox and Coin Master. The heuristic firings confirm the malicious nature of these links and the overall document. No scripts were extracted, but the document body and embedded URLs strongly indicate a phishing or malware distribution 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/431946152/roblox-games-free-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/roblox-epic-minigames-speed-hack-download-free-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-site-that-works_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-hack-just-username_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-polyguns-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-roblox-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_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_off00002e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E00 22592 bytes
SHA-256: 61c951749fa0397d271d46ac239bb2c13b9fa5cf92b57f443f3325def31ded6b
font_01_sfnt_off000060a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 18908 bytes
SHA-256: 84d65caee345121f03095492183b79d619b42f259b476684e3c421e4e92cd760

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