Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3f578b851733b1…

MALICIOUS

PDF

35.3 KB Created: 2021-06-30 23:55:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 799b4d51d4c6bdd7d924191ad9a3c212 SHA-1: 642e1b58edd0e0a9b018f58db3b4e47ffe453164 SHA-256: fa3f578b851733b1754da3efb293a0fcf93a3d0fd59a4563815bdcb0206af8f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a lure related to free game hacks, such as 'A Free Dominus Roblox Catalog'. The primary URL, http://netcdn.co/app/431946152/a-free-dominus-roblox-catalog-game-hack, is identified as a redirector to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a malicious payload or exploit being delivered.

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/a-free-dominus-roblox-catalog-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-cheat-engine-august-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-free-auto-liker_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/grandz-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/badge-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/como-quitar-no-soy-un-robot-en-freer-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-catalog-robloxcom_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-everything-in-eletric-state-roblox-hack_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_off00003053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3053 22944 bytes
SHA-256: 2022453eea8aee0cab8b4d332df169670ee7f25da13e420b399ed476e73af4c5
font_01_sfnt_off000063e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 19440 bytes
SHA-256: 76cd46edd86117ff559bb621afe10a854c04a5a45ed9a646b340a9d996d25eff

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