Malicious PDF — malware analysis report

Static analysis result for SHA-256 811bd2c146cb1edc…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 05:37:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 84c7f0880d027749fe30573279411137 SHA-1: 7759ecd6be444a8be267bf0b094daf92a5306598 SHA-256: 811bd2c146cb1edc7a24095249048ea4b5d0a6c7da5042f6d5aced440be72f60
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free generators' or 'game hacks'. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, leading them to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-generator-for-kids-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/hack-followers-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-on-facebook_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_004_off00005291.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5291 24176 bytes
SHA-256: bff7c7a7d096c1d93aba7c32a1fded95ae9d1a78471e6c9d599cff5ced1d0af2
font_01_sfnt_off000089c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C1 18640 bytes
SHA-256: 699ebd5d78640cc812bbb586150daa4d415ceda65572c7c56e250d7f18cab54c

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