Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e679538bc4c76c…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 03:28:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f6853da2ed6b11075e3ea269138cd061 SHA-1: a9d6d1a191ca55a18df8e499e17370ba30787446 SHA-256: 21e679538bc4c76cd411ed9034a18dd06e90bd938498e624fe262a9f97db55c4
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.co/app/431946152/free-robux-for-kids-game-hack PDF link annotation
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/pgsharp-pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-bee-swarm-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/jeux-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-roblox-games-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/games-in-roblox-that-give-you-robux_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_off00003167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3167 22408 bytes
SHA-256: 88e413c22c72ff9378960e3fa7003dc145a2d14b007c7b85e35c8a5439333394
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 19012 bytes
SHA-256: afbbc6672e5e67d3d08182cb82f0154e2527ac7a9675429207b3e1307e5db0cb

Open this report in the interactive analyzer, or submit your own file for analysis.