Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5073cd3a560c6f…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfdef3e4c245434f7521178080110554 SHA-1: d91295bf7835dc3fa3c8e6a12c032bbc94bca2e9 SHA-256: be5073cd3a560c6f8e08c5fc0afd898cea1271674dbad244349e7a6fa92ef3c1
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/how-to-make-free-robux-game-hack PDF link annotation
    • http://bentoking.co.uk/media/storage/editor/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/pastebin-com-free-robux-promocode_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/hacking-dungeon-quest-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/hacks-on-roblox-grand-theft-auto_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://bentoking.co.uk/media/storage/editor/files/minecraft-hack-2021_GM479516143.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_off00003271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3271 22720 bytes
SHA-256: df3593f42e85c62c106c6afb9fb5ad314101dbb3ef849b238bf110f029efc3e3
font_01_sfnt_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 19244 bytes
SHA-256: 6b22af1083df9260d35a8428a36ac91eb4c7dbc1159f4e02fe88489ba0efcc00

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