Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ea65d6827bef55…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 14:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 86f4e8f76e4734926e80c5ab2c248004 SHA-1: 85a28064bacbd5c283f24e86867828d82ec1066b SHA-256: f4ea65d6827bef55b9df2404facc65e66c6cf92af351d5fd16c2f0d8c111ced6
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/roblox-kohls-admin-house-hack-script-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-for-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/tiktok-free-key-code_GM835599320.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B5 22952 bytes
SHA-256: 2c72b5d4c40bbd5944bfebade00b403f8b6a86c98aec1c3f6f5e2af9d3422c13
font_01_sfnt_off0000653d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 19796 bytes
SHA-256: e75ee62b837209dd8ce20174806b6ea9e063e2ef4e8c6419cadbebf07d142ea8

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