Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb93e43cefb8d1cc…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 21:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 33ba509a14e0aba38119f9e88b76d7a9 SHA-1: 3d15a71953a3a15022bf2c29af9dabe36abd5b60 SHA-256: cb93e43cefb8d1cc26f62e54b6f1f42eaafb6bf6be02beeec8beb4217ad1bc9f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/free-coin-master-coins-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/downlode-a-roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/fulflex-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-robux-for-free-on-laptop_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-have-bc-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/como-hackear-roblox-movil_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/did-biggy-get-robux-free-norris-nuts_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/rbx-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/robux-verification-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-someones-password-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-i-dont-feel-so-good-hacks_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-bucks-for-free_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-jailbreak-fire-hack_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_off00002f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F58 22344 bytes
SHA-256: 0cbcdaa1cbbaaea25e0b2be590544cf1b70378f9b2d6efb0e8296f84e90b1ef6
font_01_sfnt_off000060c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C3 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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