Malicious PDF — malware analysis report

Static analysis result for SHA-256 830ee7f83d5932ef…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 12:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9aae44982609949b2b9bc2c51b312482 SHA-1: d97e9d8afd23ceda925ece22202551c8b81b62eb SHA-256: 830ee7f83d5932ef3e4aa8316a7691f2bcc56892829bd865884615b487efbc53
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/hack-spin-coin-master-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-btools-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-stealer-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_off00002efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFE 22104 bytes
SHA-256: 34975938f30dd23dc9568496985b344605c91ffa33b20cc6d6cbc2c2e541305e
font_01_sfnt_off00006006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6006 18180 bytes
SHA-256: 5cfedaf359300f2d78c418cab4259cb31a5fa1e14dd5a50147ba7c045b472e8a

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