Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96ccc769d095d86…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 15:19:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: efb1d986592ac1201cf4b19321964899 SHA-1: a9536138dcce5467e1813705d29054c96a278554 SHA-256: a96ccc769d095d863630c13cdd0b056fb1d2514c9240aceac201343260cbde62
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links and a lure suggesting 'Free Robux Without Human Verification 2021', indicating a social engineering attempt to trick users into visiting malicious sites. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document may prompt users to install unwanted software or browser extensions. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-without-human-verification-2021-game-hack.

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.
  • 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/431946152/free-robux-without-human-verification-2021-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-glames-with-gliders-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-be-builders-club-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-in-5-minutes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-draw-it-cheat_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/guess-the-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-speed-run-4-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hack-somone-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-accounts-2021_GM431946152.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_off00003308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3308 21848 bytes
SHA-256: 596c7ab26423b720dd942ec1ae65e354f57b8c6e187d39ccd4bfa0c2c5c0da04
font_01_sfnt_off00006369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 20100 bytes
SHA-256: 224766b145fea2ee77d6018406834ac88e8b97acd6b6511a2b41135dc58ea70f

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