Malicious PDF — malware analysis report

Static analysis result for SHA-256 520adc826571185a…

MALICIOUS

PDF

33.3 KB Created: 2021-07-05 09:45:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 205db16097c4dfa7ec6ceee96f6ad770 SHA-1: 88c3a78b68dce68e3d0b048188e0b3aead5a43ea SHA-256: 520adc826571185a887957e59efd3efe75cb1604778cd299f4b3a63b20c6e11a
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-can-i-get-free-robux-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/roblox-fly-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/join-for-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/invisibility-hack-roblox-jaulbreak_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-fans-for-free_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/speed-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pokemon-go-free-2021_GM1094591345.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ban-hack-roblox-trackid-sp006_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-search-for-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-run-fast-in-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-scamgames-2021_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_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 21264 bytes
SHA-256: cb34ec3b0ce2379f2ebc416ccac108fe8337a1cf497e86230e8e92cd4004070e
font_01_sfnt_off00005cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF9 18984 bytes
SHA-256: 88d69eb3e5aacbb9415b7e9d5cab519469ee3fdfdf18acc61836835876a3bab2

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