Malicious PDF — malware analysis report

Static analysis result for SHA-256 d987680d632da94c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 00:22:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5bcb2885fa71849c68c1dc64f03258a SHA-1: d96a594dc50d5c0456c2358650070d4ea58d38d2 SHA-256: d987680d632da94cb820f5c53efc0f42d754a4ce813fc032aed1e454338a4af2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/406889139/80-free-spins-coin-master-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-sign-in-game-free_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_off000051fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FC 24380 bytes
SHA-256: 54a896204a67edfa95113cc5554fd5421918abfd10447989452a5a53d689ad96
font_01_sfnt_off000089d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D9 18268 bytes
SHA-256: c17bdfe55bcf294db1fa8b97ef7603a16e409092d20395243f391f783e354714

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