Malicious PDF — malware analysis report

Static analysis result for SHA-256 71690d3f69b28f13…

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 06:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 72d37d7a6ce8c8df15eb3570ba1869a0 SHA-1: 18db570c121913edd4bf998e0c9031c6c0750388 SHA-256: 71690d3f69b28f13d02160272c82963721bf4e92085554bd69be403c3d23971a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple embedded URLs that redirect to websites promising game hacks and generators, such as 'nelson-diamant-hack-roblox-game-hack'. This lure is designed to trick users into clicking the links, likely leading to further malicious content or downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/nelson-diamant-hack-roblox-game-hack PDF link annotation
    • http://lamascheradiferro.dk/images/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/tiktok-free-or-paid_GM835599320.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-modded-minecraft-server_GM479516143.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_off00005273.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5273 24840 bytes
SHA-256: 8e675819ef9b3c22df15f2f77549f7c7b010bc930069dac3373403a8d7a4858c
font_01_sfnt_off00008b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B59 18836 bytes
SHA-256: c3729470d5648ec68cabbe40b988884fab8dc66be199ce970ade6f782ac1f5f3

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