Malicious PDF — malware analysis report

Static analysis result for SHA-256 663b9d0264268c05…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 23:38:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f5c808c6c0364bed7ce49278abaf32f3 SHA-1: 809dc9f259584d7374128876dc4b58cdb6f7cef6 SHA-256: 663b9d0264268c05a20a240ffd23ffbcc9ef7659ca77e60925bd66acd4f1e685
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a prominent link disguised as a lure for free game items, specifically mentioning 'Minecraft' and 'free generator / game hack'. This strongly suggests a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. No scripts were extracted, but the embedded URI points to a likely malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/479516143/get-minecraft-for-free-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/hw-to-gget-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-android-1-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-website-linkmon_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-free-without-downloads_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/fray-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-money-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/rxfast-ml-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-hack-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-gfames-that-dont-take-password_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-legit-computer_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/blue-banded-tophat-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-obc-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-by-watching-a-video_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
font_00_sfnt_off000032aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AA 21628 bytes
SHA-256: d2cdae2fb4c69c05010be38a206c48e9886aad8a2f0b477bd3b6299d9630741a
font_01_sfnt_off000061d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 17996 bytes
SHA-256: 4f3808e5e1f3a8df0aa5e4f6555acc355440dd5ba335f0c822ea7ee643691094

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