Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb58eb306d90d981…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 15:06:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 819a5aa1001f7095d457092c00298cf4 SHA-1: d90ef3fc324c423f92e036cee854d68a2d181b5b SHA-256: bb58eb306d90d981ac8b4c409a688081cdaaf0468e175ee6292e13057af952ff
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/coin-master-daily-free-spins-blogspot-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/pubg-uc-generator-without-human-verification-2021_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cardcode-pw-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/como-tener-robux-hack-2021-funcionando_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-games_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-gift-card-codes-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-account-taker_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_002_off000030af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30AF 23640 bytes
SHA-256: 605009f843a877e6495e1de38a4a8949119ee32bdadf27367c9993b98e11ced7
font_01_sfnt_off00006666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6666 18812 bytes
SHA-256: 754165e748b1939f240fb960abb57fbe544f87d1813c38e81129662f3dc27bc1

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