Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c0661d7bdefd28…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 06:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 200e85dd0d7ebf501c37b7a20c5e7216 SHA-1: a6a21a43b4913197ff52f6629668f9f29bc215e0 SHA-256: e4c0661d7bdefd2886bd71dac881f41fa7a625d7d9018962bd07e082105137a2
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 0.9796

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.online/app/406889139/how-to-get-free-snacks-on-coin-master-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/pubg-uc-earn_GM1330123889.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/pokemon-go-free-incubators_GM1094591345.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5229 26972 bytes
SHA-256: 7fa81375c5a453e167a00c4043453857634d8166aaba174aedcf7ead56488af0
font_01_sfnt_off00009000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9000 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000099a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A1 18044 bytes
SHA-256: 4f498c1dd6244fe1e652e91d50bd9c078400546be345500a86439e0a941b6d5b

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