Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebff89a98ac6d80…

MALICIOUS

PDF

37.4 KB Created: 2021-07-07 05:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3714d0112d8a86d3ff946ad2a2be0ae3 SHA-1: a448698744f32f628812887eda1dcf518b181913 SHA-256: 5ebff89a98ac6d8066408884984ebd36e58d5af5e52c595f980e9875b98afc3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically designed to lure users into downloading further malicious files related to game cheats and currency. The primary redirector URL is http://netcdn.tw/app/479516143/best-free-minecraft-server-hosting-game-hack, which is part of a larger network of similar lures. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9659

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 http://netcdn.tw/app/479516143/best-free-minecraft-server-hosting-game-hack In PDF document text
    • http://fobh.net/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/adidas-shirts-roblox-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-simulator-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-be_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-free-spins-and-free-coins_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
font_00_sfnt_off00002c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C37 21564 bytes
SHA-256: a75a777d834142971f7722c4b0f31ea98bf6c07c71a469f0714c55b2d8bc41c6
font_01_sfnt_off00005b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B14 2848 bytes
SHA-256: e494dfbc17a31b8b677e20f5e37602c538292163208a26380855969ce973a69b
font_02_sfnt_off000064c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 2800 bytes
SHA-256: 1756bf2370268b82899ca819fa059e16c32fca103da24d388e887c3e7a349852
font_03_sfnt_off00006ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC0 18328 bytes
SHA-256: 0b2d28431e5234c57104fb234e5f183f246f5a4819408a3d571d7ab08b18c1e5

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