Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7b0a542fa290dc…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 06:49:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a2551072e610e4fe8bebf77107673a1 SHA-1: a01ca8911cc00945a7aeb4273bc01799f236afbe SHA-256: da7b0a542fa290dc043a6115d68330b0998745137397d30f61e76da300d580ec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically for 'Coin Master'. The embedded URL, https://netcdn.online/app/406889139/coin-master-hack-tool-download-game-hack, is presented as a download for a hack tool. While no scripts were extracted, the document's structure and linked URLs strongly suggest a social engineering attempt to trick users into visiting a malicious site, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/coin-master-hack-tool-download-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/what-items-are-free-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-app_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
font_00_sfnt_off000050cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50CC 30272 bytes
SHA-256: e9e1fa3b7314a5ca7b3ff8b9feafc2884f09be4592a90694c3623594c8421327
font_01_sfnt_off00008e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E08 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000097ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 18296 bytes
SHA-256: 679f4024a0f63c0836264bcfe59f64cb99cb733805cdde821f10afb71f032f62

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