Malicious PDF — malware analysis report

Static analysis result for SHA-256 0735d5c6ce07b16e…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 23:33:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a33dccdb8ebcd60afeaf0ebc4c447377 SHA-1: 5b665a3fc9acb00852f5e4c22f5e9336788f8adc SHA-256: 0735d5c6ce07b16e328f944cc19b5cf6e5ca8e9bb2ba06310764bf960885ed16
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure of offering game hacks and generators to entice users. The embedded URL, https://netcdn.xyz/app/431946152/roblox-hack-game-game-hack, likely leads to a malicious download or exploit. The presence of a fake CAPTCHA prompt further suggests an attempt to trick the user into executing further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/roblox-hack-game-game-hack PDF link annotation
    • https://www.studio-dentistico-fiume.com/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/robux-prices_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-official-website_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-game-free-spin_GM406889139.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_off000049b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B2 25932 bytes
SHA-256: 00901bd574f45d22674e2b1f927f9d311c45ef1ac135c2e1dd3ff608f64a963f
font_01_sfnt_off0000853b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853B 18440 bytes
SHA-256: ebafd2a9612b8145e5e0fd0fae0a522d36691e15007df27d7d415ea6fce26a90

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