Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6ddc279e208869…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 17:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4f210501f45020967492375bf5f677a SHA-1: 728dae11e639427a10df29b21259b122f4e2acd7 SHA-256: 2b6ddc279e208869fa6c1aeb439cb9ee5413b7d6d5501e2658293b20fecce644
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Coin Master Hack App' and multiple URLs, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-app-for-iphone-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-cheat-codes-for-coin-master_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
stream_003_off000048a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A8 24672 bytes
SHA-256: 3eb1dc785336b4ce910f6be40171c986a02b4d24520991e1fabab4a0a64403fe
font_01_sfnt_off000080fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FD 18220 bytes
SHA-256: 839fd5949bb49b5044eb4b433cc9049edf304667089f82b00e0313599dbfb70d

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