Malicious PDF — malware analysis report

Static analysis result for SHA-256 c056b744d174411a…

MALICIOUS

PDF

46.8 KB Created: 2021-06-07 14:19:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 293e02ed3ecd3a5dd6067f19195157a0 SHA-1: 6837aca01f4635663d4b8bf5396fe5d70c9eea95 SHA-256: c056b744d174411a11247abe2545631b5cf29fbc088b9dede54be312bf0308ba
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a fake CAPTCHA lure to deceive users into interacting with malicious content. It contains multiple links to external websites, including one that appears to be a game hack generator, suggesting a social engineering tactic for malware distribution. The document's structure and embedded URLs indicate it is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/roblox-code-de-triche-gratuit-free-game-hack PDF link annotation
    • http://nicoletastancu.ro/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/get-free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/hack-full-throttle-roblox_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://nicoletastancu.ro/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/how-to-speed-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://nicoletastancu.ro/images/coin-master-daily-gift-free-spins-and-coins-link_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_004_off0000540f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540F 27188 bytes
SHA-256: e56463493e3b1ac40baa11e7097ec9dc9f32b397f2a7e7a304b0019a3b8f19e3
font_01_sfnt_off00009224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9224 19048 bytes
SHA-256: aebbac3ae7cd769c387326850b58208f886fcef1bd278eb8663382eeb60624e2

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