Malicious PDF — malware analysis report

Static analysis result for SHA-256 4938b5f0441e3c69…

MALICIOUS

PDF

33.9 KB Created: 2021-06-23 12:55:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8e455492d53a76e2cf994d281fb1f408 SHA-1: 6d8c23291486088d415fbff769f4b1ef5fa83db7 SHA-256: 4938b5f0441e3c6975e73c97f150a46be659a0de212b543972209be24a3ea8e2
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/free-robux-gift-card-pins-game-hack PDF link annotation
    • http://razredna-nastava.net/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-help-com-to-earn-free-25k-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/can-you-geet-banned-for-using-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-play-pay-to-play-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-robux-for-free-on-roblox-easy_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/spiderman-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-offers_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_off00002d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7F 22120 bytes
SHA-256: 53e17d89285656b2ae786d775513fc62fe3855ab02e237eabc09e64fa653a2aa
font_01_sfnt_off00005e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 19268 bytes
SHA-256: 97817b85d0c732475e1f33fddffcf5c9987a1b3a22c3f6102f48874508fe1acf

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