Malicious PDF — malware analysis report

Static analysis result for SHA-256 e236bb968aa634d8…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 14:53:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3cc09b083c8a29df67ba53c40ccd9d51 SHA-1: 94318f85ae7848f0a9397b24e7404a5882f0184a SHA-256: e236bb968aa634d84d9e4fae60e57f4766dee8e43c8f64cfe1c2eb26cb21dfb5
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 0.9865

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.tw/app/431946152/how-to-get-free-robux-on-roblox-website-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-very-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/pokemon-go-3-free-raid-passes_GM1094591345.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-downloading-and-no-email_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-password-hacker-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/beyond-roblox-hack-scriptr_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-adopt-me-money-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-hack-micah-on-roblox_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
stream_004_off0000519a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519A 26132 bytes
SHA-256: b41192bdf9233f910f3655b3b79b176eb6d04ace40e35fbeed36864592db2db1
font_01_sfnt_off00008c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C96 18676 bytes
SHA-256: 4ad60c1a712efa725b7ed9505e6aba56b0b01b2f313fc5e14e417367e84291ea

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