Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61dd4e61752e33d…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 14:31:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ad58844fb27aeec1f6850147184dafc SHA-1: 81eb613a2c9d3419fed91bb4d5019b08998f7759 SHA-256: e61dd4e61752e33db1b4b503b588f45fa50f626c4afc05126a03862d72558e72
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 0.9971

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.xyz/app/431946152/lots-of-robux-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1E 26132 bytes
SHA-256: eb254a14ebfc9f06e023d342651dfe291574d6b1de3315879c197000a3703666
font_01_sfnt_off00008692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8692 17952 bytes
SHA-256: 15d841c4e586d0ad4ef984c3fe87cdc5c0f17f998b76c5925d27cfadcec23376

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