Malicious PDF — malware analysis report

Static analysis result for SHA-256 332635f10d555881…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 06:05:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 30f4bd67c6b3cc28fffc58642c321eb0 SHA-1: f8be1e9e644e366bbd72de15e777ce58d618b3cf SHA-256: 332635f10d5558817ceb40c3fbca596db1823eb21e7b31bbf0fc49d5d0a49d09
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.tw/app/431946152/free-clothes-on-roblox-catalog-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-no-survey-or-email_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/20-free-spins-coin-master_GM406889139.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_off000052d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D3 26540 bytes
SHA-256: a18ce6e43fb8a6b25cab97cf880dd14781b6ed09043cc8d3b24d7c4ce10925b8
font_01_sfnt_off0000911d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x911D 18732 bytes
SHA-256: 671f34599bf202ec876732ac4cef86cb74174e6a7e8b6b533c203314e54eae8c

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