Malicious PDF — malware analysis report

Static analysis result for SHA-256 6792af2249722ee4…

MALICIOUS

PDF

47.2 KB Created: 2021-06-08 13:59:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 54a27851f6a2cb58bac52c3a1e2e3043 SHA-1: e642805f766f6459b8a570abe0b090a98ac120ae SHA-256: 6792af2249722ee49c1dad77492f8f155811a98b2ce4825c7440167d15a9cbb9
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 0.9832

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/free-robux-jan-2021-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pubg-uc-to-inr_GM1330123889.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/spins-gratis-coin-master-hoy_GM406889139.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
font_00_sfnt_off0000538a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538A 27796 bytes
SHA-256: da89ed3f779485c73fd6fcf8bb8f3c81f937c636d3a4ae410799278979816d34
font_01_sfnt_off00009451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9451 18812 bytes
SHA-256: 8f635561a80864c893ef26ea966dce70f6004425a8724d32712227ca3246d92e

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