Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b426591968459b0…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 15:44:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8bf6c22fb5bd2db09de38a46ee34dde SHA-1: 59e5c05a5557d54a921162e77e8cd3764461f272 SHA-256: 4b426591968459b09908217399124a2b0b6b726faa1cda1032fdd60b654979cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/download-apps-for-robux-game-hack, which likely serves as a gateway to further malicious content or downloads. The document body and embedded URLs reinforce this lure, aiming to trick users into downloading applications.

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/431946152/download-apps-for-robux-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/pubg-uc-bc-com_GM1330123889.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/games-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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_off000030e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 22208 bytes
SHA-256: 5d5a468d8181bcd8658d147dac95954c8ace7e13c1aa94bff1ec6ea9e8e43e3a
font_01_sfnt_off00006273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 19472 bytes
SHA-256: 70616629087e81a8d5c6ec42f1f0f5e85b80f9ec330533474097d48b8b1a7259

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