Malicious PDF — malware analysis report

Static analysis result for SHA-256 af21c2e0d0bf8ad6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 01:55:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: b2bc1d586b6c15a094369508b76d10a0 SHA-1: 5f012b6fb7d58e35511a8d2ffecb638dcfaba4a3 SHA-256: af21c2e0d0bf8ad66a6748355a5299ee31d06a53f0c15499561b1c70229ab6f8
220 Risk Score

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/minecraft-free-install-game-hack In PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-all-pass-for-free-in-greenville-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/halloween-outfit-hacks-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnsamarinda.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-hacks_GM479516143.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
font_00_sfnt_off0000327c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327C 22396 bytes
SHA-256: 8888f6d34561a34f9bca5d71ad3c7111027f12e524c6644cd45ce44210207e42
font_01_sfnt_off00006463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 17928 bytes
SHA-256: ecac4b827e849319c0c5044e9321c91e8ddddd01a8be4fd48df7e18ba0227d57

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