Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8331cd83d6dc32…

MALICIOUS

PDF

32.6 KB Created: 2021-06-18 17:27:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 691869a5f7cb80f52465ab7d46810f23 SHA-1: 70ffd61d2df2b26a141c0b2429b2634fec0796f1 SHA-256: ec8331cd83d6dc322804c890f9ce2d099c0a85c114e75df43b3254c5dc73edf4
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.co/app/431946152/robux-hacking-bans-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/free-robux-generator-download-app_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-badges-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-somebodys-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hacks-trail_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/denis-free-robux-site_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-parkour-hack-script-pastebin_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_off00002e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E07 20600 bytes
SHA-256: b1cc7e7fa306a209db78ce762f8b70bc438f6a64a9c5806e9b8c4965f08826fe
font_01_sfnt_off00005a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A95 18840 bytes
SHA-256: 6cde529d529b19c86fc43783c876ee0016a0813cbe8367caa50f1ed9183d2cf2

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