Malicious PDF — malware analysis report

Static analysis result for SHA-256 725f2e882582e583…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 02:47:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7fbf812b3a06f84f8ae7d88214d9f2b5 SHA-1: dd2c6dc1aafceab936af84ca1f28bfec774d862d SHA-256: 725f2e882582e5838b527eecaebe09d32a0dbe5bb94c0eca3203fcac2db9254b
122 Risk Score

Malware Insights

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

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 0.9980

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/free-account-roblox-with-robux-game-hack PDF link annotation
    • http://smpn1sda.sch.id/slims/repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-hack-coin-master_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_off00004a34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A34 27292 bytes
SHA-256: f6d35afcacdbb4b648238de5ab429b2823267d987c090d15edf38cb049baef64
font_01_sfnt_off00008a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A18 18676 bytes
SHA-256: 668999cf9284642de193c24d0ad86807d097fd3a0f3919542938043f8a05e142

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