Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ca1717de2db133…

MALICIOUS

PDF

35.3 KB Created: 2021-07-01 00:27:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 364d70f0a0c0b5ba3364d48779e67a9e SHA-1: 213c7b9112bc723f9736324cef12a61ce3b715c7 SHA-256: f9ca1717de2db133a0195afbbab9556fdf1d594f8c5290c83f766512a259a1df
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure, presents a deceptive download button and contains embedded JavaScript. 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.co/app/431946152/how-to-hack-roblox-games-using-cheat-engine-game-hack PDF link annotation
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/get-free-robux-on-roblox-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-robux-100-real-no-fake_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-roblox-bee-swarm-simulator-exploit_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-to-hack-into-peoples-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/roblox-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-extra-spins_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
font_00_sfnt_off00003442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3442 21652 bytes
SHA-256: 09fe936bd18ed6b22b8d0fe8852aa998e620ea3ea6095a3b36e6b507bc489967
font_01_sfnt_off000063a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A3 19468 bytes
SHA-256: ea2ade1ed402ace1df7fb850a2bf19fc7d41cce0e4acc64f899af1230d7f4821