Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cae23cbe5d3ad3…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 07:58:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dddb3e7727d88ff1b658a174d9cf62cf SHA-1: cbd10f7a17b5aa1ab64e7c64b4b84b964c7debad SHA-256: 16cae23cbe5d3ad3f585b8366376de614443dd5d351a68409369c5ee73cbfbd2
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 0.9832

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.online/app/431946152/www-mistplay-com-free-robux-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-hotel-roblox_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-2021_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_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 29328 bytes
SHA-256: 8764007908c5bed891bbef5cd3dbcf4fd6e4ad654bc0bb07b4138b098df7bdcf
font_01_sfnt_off00009169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9169 19712 bytes
SHA-256: 474221847c471da22e92af20eac2f33437bbaeb0cf488e0b5b2c7bc49f385682

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