Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4173af9471b976…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 11:11:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3fe26cf71d8ce5e51aa301557246a6ac SHA-1: 6a5e4f6d0aac28ebc322d92797fd2494d33714ac SHA-256: ee4173af9471b976793c51f140906d6f30187f60c31e69d83221286af0889886
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and links to known malicious redirectors, masquerading as a 'free generator' or 'game hack'. The primary URL, http://netcdn.tw/app/835599320/no-human-verification-free-tiktok-fans-game-hack, is identified as a malicious redirector. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/835599320/no-human-verification-free-tiktok-fans-game-hack In PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-gift-card-pin_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-get-free-bc-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/soda-crush-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/rbx-com_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3323 21528 bytes
SHA-256: aee2d9bf072189456b9f6d8a208f973d38431064677baec71fb4ce2d5fbc15fb
font_01_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 18508 bytes
SHA-256: 80e8f2a6f5f4964856d603e152d7822e52511dbb61d6a3eb2fbd5dda3d15bb05

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