Malicious PDF — malware analysis report

Static analysis result for SHA-256 4205d1a22ce3a00c…

MALICIOUS

PDF

225.8 KB Created: 2021-07-05 23:41:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dcb75449bfe2d04ae59f1c017f183896 SHA-1: dd32b3dfd1553c44fdf1f9464f5847d818fa1155 SHA-256: 4205d1a22ce3a00ca1175ba1c3bcf829bd5428cf8879709284a3759465573ee9
172 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake browser/software-install lure and 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 clean score 0.0118

Heuristics 7

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.tw/app/1094591345/how-to-get-pokecoins-pokemon-go-free-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/best-free-roblox-strategy-games_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/apk-hack-game-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-human-verification-or-survey-real_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-200-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-items-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-a-hacker-out-of-your-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-cheat-noclip_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-ticket-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-bloxburg-build-hacks_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_023_off00031b43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B43 25728 bytes
SHA-256: b3176ad05fe95f03992e3cd3dc20b3bc0ca1b3195d2b3fbd608782988b7650eb
font_01_sfnt_off00035769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35769 18744 bytes
SHA-256: 3edbda6fb8a435c255af7df5b3aab39eb7e3f26ed18762ffb89d1c44519c5c3d

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