Malicious PDF — malware analysis report

Static analysis result for SHA-256 d581d67ebe1bb383…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 14:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea811ea5c9ef7b6ba8f3625aa197da55 SHA-1: 9efc9e4854c020ff096f7e511cee533c0f3cc094 SHA-256: d581d67ebe1bb38305b53bff7b42a376748948165c988f4fd8d2928ff74f8336
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/406889139/coin-master-hack-spin-generator-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/free-robux-by-watching-videos_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cheat-engine-roblox-super-power-simulator_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-2021-inspect-element_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/get-free-robux-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/anti-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-play-heroes-online-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/telecharger-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/games-you-can-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/all-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-group-clothes-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/www-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-player-launcher-free-download_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-apk-download-unlimited-robux_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
stream_002_off00003397.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3397 22736 bytes
SHA-256: 7e55207d44b617cc30ea013fe3e6743c4c7f4cf06b022086b3df9bf029c739a8
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 18180 bytes
SHA-256: 5a0d5a9706c686390347041011529ae3d666e1fac640aabc1903b679691daf3f

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