Malicious PDF — malware analysis report

Static analysis result for SHA-256 7680b39bc271b12c…

MALICIOUS

PDF

226.8 KB Created: 2021-07-08 07:29:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e4b0f8ba4c548a67b7120ff54afa1179 SHA-1: 4070cffe27da82696643f427da6b32a54a2e7e14 SHA-256: 7680b39bc271b12c6a8cca8fded76f7c415cbbc6e5eb35bb89ae3f8373355665
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/pokemon-go-free-dragonite-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/youtube-how-to-make-something-on-roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-800-fre_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/como-hackear-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/new-op-roblox-assassin-aimbot-script-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/lointh-gaming-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-fly-hack-in-roblox-lumber-tycoon_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/its-free-real-estate-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheat-roblox-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/pubg-uc-shop-bd_GM1330123889.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-link_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_off00031f37.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F37 25576 bytes
SHA-256: 2f1eb303e3abc46c67a2df37158668937dedf4fd1860b72d16ff1e664052f8e4
font_01_sfnt_off00035b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B3D 18748 bytes
SHA-256: 1868994ae7af8da47227417a5420a19512b58578c760db5d0136c1d05c3682c9

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