Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a84cee8dd155ca…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 20:15:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3281fa0f405e1ce5a4fd205982c794b SHA-1: 869d36ff27b759299c09d7dfb16699226a88e4d4 SHA-256: 39a84cee8dd155ca45bf6c9fd11b3dc026d2954422956195c4f3da60fb2dacbb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as malicious redirectors, specifically targeting users with lures for game hacks and free currency. The primary malicious URL identified is http://netcdn.co/app/431946152/find-the-code-and-get-400-million-free-robux-game-hack. No scripts were extracted, but 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 0.9980

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.co/app/431946152/find-the-code-and-get-400-million-free-robux-game-hack In PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/roblox-how-to-hack-in-games_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/roblox-admin-gui-hack_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-robux-hacls-no-download-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/dev-console-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://elearning2.man1kotaprabumulih.sch.id/__statics/gudangsoal/files/reddit-coin-master-free-spins_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_off000031a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A6 22524 bytes
SHA-256: ee7e8deda45150efe78833050088eefe556d16e5a252d158cf1031b52c69ea6b
font_01_sfnt_off000063ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 19784 bytes
SHA-256: 8bcad1669b08a650f719517847d75cc24646177a1e9eb395aac1fef23baa48a1

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