Malicious PDF — malware analysis report

Static analysis result for SHA-256 043f6b0d0cd8fa5c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 22:26:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d59cce104cb88f0bd9290ee9f844ed5f SHA-1: 56d35c6f3cf083aba5c1c4e96c8319400f94c731 SHA-256: 043f6b0d0cd8fa5c00f418a2f008de627c56e6207f7e72a0257e8256aeea0982
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/431946152/free-robux-accounts-2021-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/master-game_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-wurst_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/app-cheats-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-apk-35-18_GM406889139.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_off00002ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED8 22464 bytes
SHA-256: 58b6fad879dfb2b466fe33a9affec7f3f7b498eacdb2ac1a930c835b577e0369
font_01_sfnt_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 19224 bytes
SHA-256: 156e97e656f4bb783494abd7ae53ecfa8912a458841a7d4a142d29130362a46d

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