Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8305afd0fda5611…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 15:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 319902d2df2ec3b02a6000914a844989 SHA-1: 6ed1c114b98983d523aa68d6d5bddeaf63f855e7 SHA-256: b8305afd0fda561169612b3db421f924fdfcb4dfcf2e9b4aa29d53d511c43e31
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'Roblox Prison Life Gui Hacks' to entice users to click on a link. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-prison-life-gui-hacks-pastebin-game-hack, which likely leads to a payload download or further redirection. The ML classifier strongly indicated maliciousness, and the presence of numerous game-related lures reinforces this assessment.

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/roblox-prison-life-gui-hacks-pastebin-game-hack PDF link annotation
    • http://digilib.pustaka.unand.ac.id/repository/get-free-robux-pro-tips-guide-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-cutie-mark-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/click-for-free-robux-png_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-cool-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-change-robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/andi-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/dragon-ball-z-rage-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-infinite-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/fort-wars-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tix-roblox-pbb_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-a-free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-granny-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/exploit-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-hack-nopde-engine-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/best-app-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-card-pin-generator_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_off00002f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F30 22584 bytes
SHA-256: 5b2a8033b39bbdf7155cb7067a83cc769cfc4604fde3eb38561f6b03e5ee4b8a
font_01_sfnt_off0000616b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616B 19176 bytes
SHA-256: 5a4090734e9d4a48c1a06516c84080ec678d0730d817567495c5d0aca8a90565

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