Malicious PDF — malware analysis report

Static analysis result for SHA-256 254c56aa8abc8984…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 09:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ef606df36f7b524ba5a28b72fb067d80 SHA-1: 135484b2dc77000b81a5ef890998a276dbd0647f SHA-256: 254c56aa8abc8984db37c4c19c28bace56256156df5e1f160e7916671dd66cf1
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 0.9865

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.online/app/431946152/roblox-madcity-niveau-100-cheat-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-see-chegg-answers-free-tiktok_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-phone_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
stream_004_off00004d7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7A 25128 bytes
SHA-256: 574820ec9d3c93363648407474d546137ebfaaaec4a4a847d5f5234de6022788
font_01_sfnt_off0000858d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858D 19484 bytes
SHA-256: 7b43a644babc63d72c572149c486ae4d8091c5b6a76315b606d4ce7e23986e97

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