Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff2511f128192d…

MALICIOUS

PDF

45.2 KB Created: 2021-06-11 00:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c17863dff13763905711837b4da1d212 SHA-1: ac1c7631dd508349952f6738e10c0d5054822800 SHA-256: 65ff2511f128192d51ec2bda94956d9e2fcce5490da4a4c2621193d66332a6ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a URL associated with free Robux generators. The document body, though partially corrupted, also contains the same URL, reinforcing the lure. The primary attack pattern involves tricking users into visiting a malicious website by promising game-related cheats or hacks. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/hacks-to-get-free-robux-on-roblox-in-2021-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-dragon-ball-final-stand-cheat_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/more-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/money-hack-roblox-adopt-me-2021-july_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.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
stream_004_off00005077.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5077 25944 bytes
SHA-256: 6ee017ac3984691fcc667b2945f502519b1661b77e271eb0d077984dd16c09ba
font_01_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 18992 bytes
SHA-256: 39dfa5c871216241ecb264b54e691f685d905c5159a301590e4dd0e79865bd76

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