Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5ed5082525c452…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 17:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 889eb8f21eec667ecfad9f7aff7055e6 SHA-1: d65054684c21578640e82df9fc1dbb79e690ec64 SHA-256: 6f5ed5082525c452715cfe5e77d47b61209bd6b392484705ca5701e43fbf2f92
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/406889139/coin-master-free-spins-hack-but-no-surveys-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/roblox-free-builders-club-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/juego-de-roblox-hecho-por-un-hacker_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/before-dawn-hack-roblox-pastbin_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/gratis-hack-royale-high-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-with-none-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/doxnald-cheat-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/fake-hacker-id-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robloxheroxyz-free-robux_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_off0000300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300D 23400 bytes
SHA-256: 283a07544b96ee3cb0934e5c767970b28f308b2c3b24fb6d5d73e16f1ea068c8
font_01_sfnt_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 18992 bytes
SHA-256: 97804845bf467d2aeff7c85d47b4467823aac43885222e40ee61a94876ec16b2

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