Malicious PDF — malware analysis report

Static analysis result for SHA-256 849bf2cd09518099…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 05:04:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 24ef6ccf8a2334975345e84b0bed220d SHA-1: 1401785b20a3b21463fab4e9a3eb0f2294033f2c SHA-256: 849bf2cd0951809930f49ed8a4e5ae9d9dece92e53651905ebc3d584117ef09d
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/pig-master-coin-master-free-spin-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/roblox-galaxy-cheats_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/cheat-codes-for-skywars-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-codes-adopt-me_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hacks-2021-epic-minigames_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-make-a-free-shirt-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-para-jailbreak-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-free-akatsuki-shirt_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-nintendo-switch-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/street-fighting-simulator-infinity-stat-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-gamecard_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_off000030e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E3 22488 bytes
SHA-256: b4d72caa52eff6910d42d1a129e3b35fae3287cfc7489c362e29d318155c47c6
font_01_sfnt_off00006300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 18328 bytes
SHA-256: 7fc6a102d94eb6ecd4fce1d81166f8bf1d44e62dd1c3248b5361d895f7f4d4be

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