Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90640b4a649b348…

MALICIOUS

PDF

36.4 KB Created: 2021-07-06 08:33:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9b86951cf9aeabb4ea01407bf38d3e0c SHA-1: fe212f722c55138d6bde3b40f25eec2aaa09153f SHA-256: c90640b4a649b3482e878cd91ba1fadc141d53636e3bad966c4e4940bddfd83e
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/479516143/how-to-get-minecraft-for-free-on-xbox-360-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/pokemon-go-free-games_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cheat-engine-hack-roblox-rpg_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-promocodes-robux-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-free-items-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cheat-codes-for-roblox-on-the-games_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-sand-simulator-infinite-backpack-code-hack-android-no-script_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_off000033c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C2 23396 bytes
SHA-256: 9363377c0d1ad613eb651e444c70861480d8aeba115d3d586d671100a46ed50f
font_01_sfnt_off00006899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6899 19272 bytes
SHA-256: be4e4cfa6447639dab1aab73115b89b5c0a266ccc56e5f2a9c44b167d4487d1a

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