Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ba7be059857d29…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 05:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ee50b886ee5e999548106e1e6dd2c5bc SHA-1: e8884de60536bde71d3b9324e9d14207068fd919 SHA-256: 90ba7be059857d293974993f5cee9a6fa852337957956a5e6c8401acd9cda9ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game-related content, suggesting a phishing or malware distribution attempt. The embedded URL 'https://netcdn.xyz/app/479516143/minecraft-windows-10-mod-menu-game-hack' is likely the primary distribution point for a second-stage payload. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-windows-10-mod-menu-game-hack In PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/como-hackear-coin-master_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
stream_003_off00004ac9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC9 25112 bytes
SHA-256: f370f167d806f7e6bd365d43fed4752b794c2093ad0214fb781c6d49d68b30aa
font_01_sfnt_off000083a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A8 18664 bytes
SHA-256: d514bf315b41fa54fe0c50a97b4da26b79196549822ea3c6d635b98116ec41ec

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