Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21f9807e6a135f0…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 14:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a4479018f67da26946f59565008d01c7 SHA-1: 0980c2befbd554d6203ef55d3424f2099f4cdb51 SHA-256: b21f9807e6a135f061c05eccb3c03d2e17bac0e23feb3318d7246a20771a9b8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a malicious redirector at http://netcdn.tw/app/406889139/como-hackear-juego-coin-master-game-hack, which is designed to lure users with promises of game hacks. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, likely leading to further malicious content or downloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/como-hackear-juego-coin-master-game-hack In PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-pants-not-by-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/robux-hack-text-verifacaton_GM431946152.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/free-space-in-roblox-bubble-gum-simulator_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/como-tener-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.man1bukittinggi.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.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_off000033c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C4 23052 bytes
SHA-256: b875aa2eb2c1a9e0308a24566bed94d17bda8c722022eb32c25e98d58c6c56c2
font_01_sfnt_off00006785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6785 18572 bytes
SHA-256: dcb0f7209876737d9391e01b9e60359bbf0ecbaf592df50703e8128120853b9b

Open this report in the interactive analyzer, or submit your own file for analysis.