Malicious PDF — malware analysis report

Static analysis result for SHA-256 251311c469ab7040…

MALICIOUS

PDF

52.3 KB Created: 2021-06-03 10:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3e1eea7e2b17b55d7dfcf0adb53a321c SHA-1: 503f75711a386bfe08159da741a1e8161d59b38d SHA-256: 251311c469ab7040e65b1f8a1431627c3081ee6f807db778544132d8692a1c50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free generators. The primary lure is a 'free generator / game hack' for Coin Master, directing users to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/406889139/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-android_GM406889139.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F94 25492 bytes
SHA-256: f1eedad614fbea9763da364e193ce1cbd961b39cb95f60f6d804616b969586f3
font_01_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off0000944d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x944D 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D8 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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