Malicious PDF — malware analysis report

Static analysis result for SHA-256 22adc3bbf80ca555…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 13:55:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06a2d4ffc958a8235ee5b1f1cb307e4d SHA-1: 69e7a97e894aa16834576fe6bded408ecf9d9143 SHA-256: 22adc3bbf80ca555beadda314059e308e37a2febbc7e4d79bccf94cb9e825260
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, disguised as a "Coin Master" free spins generator. The ML classifier also flagged this PDF as malicious. The presence of these links and the lure suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-free-spins-today-daily-links-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-youtube-tiktok_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/ispoofer-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-games_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
stream_004_off00005008.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5008 26396 bytes
SHA-256: d899ac9d3d36b2788fe02a49bd75af264b2446650dc279ad963b77daf19c355e
font_01_sfnt_off00008c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C44 18652 bytes
SHA-256: 52d597ff4b9023df6b3510b92f87dc1d2329aed0448bc9fa59130058567cb992

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