Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba9faa3362a76b9…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 22:43:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2b233c8c3008b4d6bde917ff69bd3255 SHA-1: 076477153e83d7126255fcd81df1b3fbcb1d582e SHA-256: 6ba9faa3362a76b9b5c9face899108d97f6928430b8b6240f8a4d786244fa0ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.co/app/431946152/uirbx-club-hack-free-robux-generator-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

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/uirbx-club-hack-free-robux-generator-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-and-tix-online_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-zoom_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rexic-roblox-hack-full-lua_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-skin-maker_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_off00003295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3295 21600 bytes
SHA-256: d73d508d9803f7a5915aae4f66395dc20c5e7ae5e42c4e420dc095c7b63c149a
font_01_sfnt_off000061c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 19184 bytes
SHA-256: 7f92eb964cbc657515a839de73823a0068c3e0e0bc7432abb8618e00085ac191

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