Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c53971ce0bea070…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 04:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d5b884f2dedb744d6e20dacc2d43827 SHA-1: df38acf9347799584da518b4240b72ba4d2ca439 SHA-256: 8c53971ce0bea070d2d5126ecd45270cfd7b9232d73328ccb043b9fc4322eff1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as game hacks and free item generators. The primary lure is 'Free Spins And Coins For Coin Master Game', directing users to 'https://netcdn.xyz/app/406889139/free-spins-and-coins-for-coin-master-game-game-hack'. This pattern suggests the document is designed to trick users into visiting malicious sites, likely for further malware delivery or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of 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/406889139/free-spins-and-coins-for-coin-master-game-game-hack In PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://math.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-accounts-2021-with-robux_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_003_off00004b2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2C 25368 bytes
SHA-256: 51ce39910c3f81e68bc2f95b4341b49a2fa165b4e99111e09854ee79804730e3
font_01_sfnt_off0000846d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846D 18320 bytes
SHA-256: d1cf6b486e789d6a7a281824944966070be141b92be060b449a52bae7023ebff

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