Malicious PDF — malware analysis report

Static analysis result for SHA-256 150436eefaf7bc1c…

MALICIOUS

PDF

52.0 KB Created: 2021-06-03 04:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7712724ca9bd63a796802f07901c765d SHA-1: d8a78bf3fde98b54dae39ed19f3d0e3e9665551b SHA-256: 150436eefaf7bc1ce9fbd711a86f2a1f909d61042c8775f5bda21950def0d2c9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-codews-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://netcdn.online/app/431946152/free-robux-codews-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/is-tiktok-free-to-download-on-iphone_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-cs-ro-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/tiktok-free-ebooks_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.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_off0000552d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x552D 34892 bytes
SHA-256: 934d74daf4dd55a10c6fbfed7a46bcabf1e33ee7a6d1bb76086da19c2d2d743d
font_01_sfnt_off0000a923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA923 18352 bytes
SHA-256: a99258d878c28015bfb3fd9a193460244d91576465dea2a8eecee888481bed33

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