Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf81f6499055c94…

MALICIOUS

PDF

36.5 KB Created: 2021-06-17 17:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f270ed1e495a1930747f5a93dfb264ea SHA-1: 12089500f07408ea7c4bc33f27a39f321cef2f6b SHA-256: edf81f6499055c942e4c62328766b423e305755bae16ef9ec0d04a95fd1ed707
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.co/app/431946152/roblox-hacker-2021-download-free-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-case-clicker-cheats_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-2021-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-use-speed-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/unpatchable-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/pokemon-go-free-pokemon-generator_GM1094591345.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_off00003386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3386 23204 bytes
SHA-256: 5cf974e6437e9d0680f3a297dfd89afbee90aab7e47810d90c6e44a0c309447c
font_01_sfnt_off000067c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 19728 bytes
SHA-256: fdb0072cec18b763f866db6a230eaedd3d8ed50fe9282b5bd272f6130d3fb949

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