Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d77150cd4d911ec…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 06:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3765652c6b5e3372ae920ebba1699f7 SHA-1: 8d8ebeff1a7e74881861c4d875a7f77a038df0d1 SHA-256: 2d77150cd4d911ec6982c1d9bea16a19765bf42f0bfdf39fda0b4cf2aa2cbdbe
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/431946152/robux-free-robux-game-hack PDF link annotation
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-how-to-get-passes-for-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/download-noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/wurst-client_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/soul-dynasty-roblox-hack_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-code-giveaways_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://danginpurikauh.denpasarkota.go.id/new/public/ckfinder/userfiles/files/block-best-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
stream_002_off00003190.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3190 22468 bytes
SHA-256: a8ea2fd9d2d08b662a9dace98309bdcdfc016c72434e65ba10fe170e2d810d46
font_01_sfnt_off000062e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 18716 bytes
SHA-256: 776cb4e5338264d595c967a8fec9379201c9a4b17293b3c44edd5cf6cd499e31

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