Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bda3ba26796fd22…

MALICIOUS

PDF

44.6 KB Created: 2021-06-10 19:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73e5dadcd5ff50933e0a0f20cda72e9d SHA-1: 35b0b86cc5deaa8fd62dbc579be14f41ff80fc97 SHA-256: 8bda3ba26796fd223b1631baff3bb086b58305aed47c1e89c3e67eeb3ee4cf46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a prominent one to 'roblox-blog-free-robux-game-hack', which is identified as a lure for game hacks. The ML classifier strongly flagged this PDF as malicious. The document's purpose appears to be social engineering, directing users to potentially malicious websites under the guise of offering in-game currency or cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-blog-free-robux-game-hack PDF link annotation
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/denisdaily-skin-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-hack-character_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/get-free-robux-now-com_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/roblox-redeem-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-get-free-vip-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-god-yourself-in-roblox-not-hack_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/three-rubux-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-hack-pizzeria-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://opac.fuf.uin-alauddin.ac.id/repository/coin-master-free-spins_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_off000050f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F5 25860 bytes
SHA-256: 36a98d5c341da4e190a158c50cbfba03e8da9e79a105a2aae30d441fbf80bb51
font_01_sfnt_off00008b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 18376 bytes
SHA-256: da38d654aa85b6d2855a46135334e8c278c4d5eb7878cbd7005a6b4c493af382

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