Malicious PDF — malware analysis report

Static analysis result for SHA-256 249098f935b5ecd4…

MALICIOUS

PDF

36.7 KB Created: 2021-07-03 20:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b5385ea13808d9034c9f42b8c6149a8 SHA-1: 94118e583452c458bc75c3c4c956135a7af039c9 SHA-256: 249098f935b5ecd4f16f343e1306de225cda22bf81ac758bd51a377d80fb20f9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack. This URL is flagged as a redirector for game hacks, indicating a likely attempt to deliver malware or conduct phishing. The document body and heuristics strongly suggest a social engineering tactic to trick users into visiting a malicious site.

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/431946152/free-robux-no-human-verification-or-survey-or-download-2021-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacked-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-robux-free-button-script_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-how-to-get-free-clothes-on-phone_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/comment-avoir-robux-gratuit-2021-sur-pc-facilement-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-promo-codes-2021-october_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-codes-for-roblox-speed-run-4_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-exploit-hack-full-lua-overpowered-commands_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-gift-card-codes-septemer-28-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-blox-peace-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/dife-ml-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/longshot-roblox-hacks_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_off000032d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D2 22696 bytes
SHA-256: 824f55c880c541cd65b2c10a95c21cb1b8a5b5b7f52af7ba324d246a5fa31704
font_01_sfnt_off000065c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C3 20608 bytes
SHA-256: 84e083980845d6db402b7178d67bc98d29f4cdbc71d93f4e93f474fc98f39a9a

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