Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f229ef7c4d503f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 23:42:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 04247e4fec4d0b1d0976e526eb179579 SHA-1: 77d79a68c4bb2a3e8c05af2eca88b702ea81746a SHA-256: 90f229ef7c4d503f23aff3f72fc710da891e96188f4ffd2bdf6280ba9fc050e2
82 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/collect-robux-game-hack PDF link annotation
    • http://librarysenior.com/repository/exploit-for-anti-hack-games-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-by-calling-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/pubg-uc-buy-ksa_GM1330123889.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-support_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_off00002dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFA 21932 bytes
SHA-256: 7f69df9b7e157a4e373a143ae7b35cf63bd574c399c106a743cddc180dd06c17
font_01_sfnt_off00005e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 18728 bytes
SHA-256: d66c08f78f239917c4ec7ae029ac685f0727a5c25a17f7bea25f393002770508

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