Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5b220ed1926698…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 22:55:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3bf3535f62df02e21f3bf597edcb791d SHA-1: 1b8df7d3f7bd3f2597854721c53de239119d0fa6 SHA-256: bb5b220ed1926698dcf09feca1debea4ba4f82f4c1a4f83f3de04ca63ea59817
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for free game currency or hacks, directing users to a malicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL strongly indicate a social engineering tactic to redirect users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/no-scam-free-robux-game-hack PDF link annotation
    • https://5dollarslogo.com/ckfinder/userfiles/files/free-robux-no-veracation_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/upside-correctional-facility-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/promo-code-list-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/free-money-for-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.5dollarslogo.com/ckfinder/userfiles/files/roblox-dayz-hack_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/roblox-apocalypse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://5dollarslogo.com/ckfinder/userfiles/files/hacked-roblox-accounts-list_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
stream_002_off00002d25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D25 21744 bytes
SHA-256: dd85fa6522eab6b51c30304f1b7d04368c40a508a603bc2d3cb9c469624e7dc5
font_01_sfnt_off00005cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFB 18976 bytes
SHA-256: 5f7e0103c70b1f60985bb62ced08c37b8d4368b496e7598f685b49347f4f33a0

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