Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b043b757afc554b…

MALICIOUS

PDF

46.8 KB Created: 2021-05-17 05:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f314949e08681923ccd934867532fcb8 SHA-1: 2510d2c65a82b405aa6da3e546c5019bf69468d7 SHA-256: 5b043b757afc554bee9d3409a096479ec95f648b233ebae60f936d15c62b9e90
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, disguised as a "game hack" or "free spins" generator. The document body and heuristics confirm the lure is for game-related cheats, aiming to trick users into clicking the malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-free-spins-link-download-game-hack In PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/spin-link_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://gzhi.govvrn.ru/uploads/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A76 26632 bytes
SHA-256: 449c1e57f2b2317d736c1358baeda80a90999325a15720194c1c1ac4f44c8c73
font_01_sfnt_off00008843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8843 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000936d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936D 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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