Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1513da1aa56d679…

MALICIOUS

PDF

36.4 KB Created: 2021-07-04 21:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 766feddf424d281944ee56cdc68d1c63 SHA-1: 6d430666593e50f7a37b5d71a75602d9bf0de240 SHA-256: a1513da1aa56d679f5a0c37555d98bd13d0f21d409f340e7e9c422dc06e34947
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/how-to-get-free-robux-on-roblox-2021-game-hack PDF link annotation
    • http://lib.akper17.ac.id/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/cheat-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/checkbackgroundnet-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/minecraft-windows-free_GM479516143.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_off000033fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FE 23304 bytes
SHA-256: 0547aa5e2766da5e2e71625c9086441075b1edcda1d55f958930182054a83428
font_01_sfnt_off000067da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DA 19460 bytes
SHA-256: a88a3b37d26ae7f28ec6954540056097f0f8d6b678a801dc09bd2df82b34d325

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