Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c90d31b338aa44…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 21:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae5f48ebc90835482f714349193f762b SHA-1: 18a85f4c077809756049ee81cba0bc99ab80a55d SHA-256: e1c90d31b338aa4464ccdc576146b2260bbe213574e46502c56950a3c2872bd2
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/how-to-find-hacker-accounts-on-roblox-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-oprewards-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/gabes-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/when-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robloxgiveawayxyz-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-gift-card-codes-free-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-money-on-roblox-ultimate-drivin_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-downloading-apps-or-human-verification_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
font_00_sfnt_off000031e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E0 22160 bytes
SHA-256: f486051c3a6a93f3319ee9fcd48f4bd2de0ef2051e1e2b48f120cd2cad16f6b7
font_01_sfnt_off0000632e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 19524 bytes
SHA-256: 9bda9baa79117eb35fadf927f39c6eea4a0236ec604f456c360dc751bf108c64

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