Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b8dfb17f2cd5ce…

MALICIOUS

PDF

37.3 KB Created: 2021-06-28 08:24:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b811b515891825a6c4f9f7449990023 SHA-1: 4f2a04b48c948301501c1a7e791e36a58b1bdc7d SHA-256: 46b8dfb17f2cd5ce7b28f7c8be7e69f3d0782a6811267804458f9cc76ffcd5c3
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 0.9981

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/how-to-get-free-robux-hack-2021-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacks-for-drifting-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-download-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacking-ldshadowladys-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-stuff-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-get-robux-for-free-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-with-free-gamepasses_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off0000364f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x364F 23436 bytes
SHA-256: 1294c800b30821eae080fd8562a0496dad1d26de4619fb8a37757827ca6b625f
font_01_sfnt_off00006b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 19556 bytes
SHA-256: f212cd4c9928ae438aa9e71512a10d010177ec0841fcd267cfedc658cf456714

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