Malicious PDF — malware analysis report

Static analysis result for SHA-256 966426ec1fede46d…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 10:17:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14adfcb912302e3de94fa9057d7dc39d SHA-1: 11afe899f6e752ca66cc78ad517e2f0b8ca717c4 SHA-256: 966426ec1fede46debee786dadf75b57580de74064b9bb7fdfd59d3337684a5f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a "free generator / game hack" for Coin Master. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to drive users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-free-daily-spins-and-coins-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1D 23904 bytes
SHA-256: 0c482345ef89ed3a4f2853577996af233e69d791f790069458b0e40e85930089
font_01_sfnt_off00008058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8058 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 18480 bytes
SHA-256: 88c5a76ee56cb7e28b06cf9e90949f5a0fd4a72b6dddac6cb3c8c84aebf5620b

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