Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f9df361d97ecc7…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 07:15:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eaca088da287c532f019ec4da2e65b75 SHA-1: 7d391de8f9ef8d43619b00146627bcd99f33768a SHA-256: 20f9df361d97ecc7810000d9c282a5c711091560634bc9797b142521b77823ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-link-spin-game-hack. The document body and embedded URLs suggest a social engineering lure to trick users into visiting these sites, likely leading to further malware downloads or phishing attempts.

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/406889139/coin-master-free-link-spin-game-hack In PDF document text
    • http://www.boic.nl/images/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://www.boic.nl/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.boic.nl/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.boic.nl/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A33 24192 bytes
SHA-256: 9c50ace78580c542b8e71beba08b329ecf15ec223634db2470663da8cfcd2aa2
font_01_sfnt_off00008132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 18056 bytes
SHA-256: 73446086b7970e4c311ea7edd0e96fe93bb69e7a29ec1c6c70349cef1a9e8050

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