Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed3f7141be89f9a…

MALICIOUS

PDF

227.3 KB Created: 2021-07-08 15:57:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a3ac68f153b86307b40d959e3f2f742f SHA-1: 68bd637ff66c89cd01237101fb2e3b4a3f33423e SHA-256: 7ed3f7141be89f9a2f2242079ef5dc8610752de3c42b0da93aa56994a03af641
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/without-pokemon-go-free-account-2021-game-hack PDF link annotation
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-roblox-supreme-pants_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-robux-hack-generater_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/using-cheat-engine-on-roblox-bluestacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-many-has-roblox-warrior-cats-been-hacked_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/2021-lvl-ro-ghoul-in-roblox-cheate_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-roblox-money-on-computer_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-hex-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-generator_GM431946152.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_023_off00031f32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F32 25576 bytes
SHA-256: bf075e1886921ac79161bae149de9843346c5bada073351c05a43a436d0b9699
font_01_sfnt_off00035b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B29 19488 bytes
SHA-256: 4aa7f2bf0ed872681fa49845b943e1012be452d693b1f2454105fec996e116f2

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