Malicious PDF — malware analysis report

Static analysis result for SHA-256 689dd8beb1cbb86a…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 16:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce5968c949e995dab05037de2b36a907 SHA-1: d4651de1d4c66de02eae8106e292d2a9c3a59e80 SHA-256: 689dd8beb1cbb86a104c9cf5d25ba8c3f6e42f2ee9d8121c47fdc6f1f6016272
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-robux-daily-rewards-game-hack PDF link annotation
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-pizza-cheat_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://preverjaboticabal.com.br/assets/uploads/canal_alpha/files/free-robux-earn_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_004_off00005116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5116 26132 bytes
SHA-256: 08c7130222da2dd4e82e7097d80d474f19a7be351d0e1be1090ee2a91c878fa3
font_01_sfnt_off00008cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD7 19124 bytes
SHA-256: 06f9303a561df45295f01b40b2e71318a67d6fbaa6f50d757055ed450302a6d5

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