Malicious PDF — malware analysis report

Static analysis result for SHA-256 57412d675e0d4ec9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 01:24:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9c081c703503a3a906af94894757519d SHA-1: 4fdf86f3fad52c02204f63f3ca7e98dc9521237f SHA-256: 57412d675e0d4ec973d736bb4241c2a55e9afaaad67aa5d142a244e726e4d02e
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/free-robux-generator-for-roblox-2021-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/how-to-get-free-roblox-catalog-items-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheats-pris_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-monnaie-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-to-take-games_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-genearator-2021-no-suryve_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-gta5-download-free-robux-veebucks_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-free-kanto-event_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-people-on-roblox-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheats-roblox-pc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-dominus-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-items-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-hack-net_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_off00002f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F89 22288 bytes
SHA-256: fcb402739e491b4e84b2fb542586a21893489201e8e20ea847e52ff3656cca7f
font_01_sfnt_off000060fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 19296 bytes
SHA-256: 1c5b5ef18537994d2b9d4bcfadda653dfd61b801510ea22c778e1317dc9212ff

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