Malicious PDF — malware analysis report

Static analysis result for SHA-256 afad77aa0fa4db2e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-24 22:25:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6d33d91bfe5e4e52b967db00fc73186e SHA-1: c8234598747ae783f2ff4e14b9e174673cd21fcb SHA-256: afad77aa0fa4db2eb9d1735627c0307a6b181ca58ab30754406513b103221d3f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Roblox, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URL `http://netcdn.co/app/431946152/roblox-reswood-prison-lua-hack-game-hack` is likely used to download a second-stage payload. No scripts were extracted, but the PDF structure and URL indicate a phishing or malware distribution attempt.

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/roblox-reswood-prison-lua-hack-game-hack PDF link annotation
    • https://gobeepbeep.co.uk/media/storage/editor/files/pubg-20210-uc-price_GM1330123889.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-sha-vaca-do-roblox-id_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-play-as-geust-for-free_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/halloween-outfit-hacks-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-free-download-in-germany_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/free-robux-without-verification_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_off00002f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6B 21976 bytes
SHA-256: 67a9705ac314bbf15983f89e23dc0c29dad7d465745b06bd7af6097ffd1499b9
font_01_sfnt_off00006013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 19408 bytes
SHA-256: 58c29dd22a01d99e3de5cfbc68ec80882d6070bffb221a73718f1b9a8e66599a

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