Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9973fc83c5b01a7…

MALICIOUS

PDF

51.7 KB Created: 2021-06-04 01:15:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0d876ac703a590183e299d990439a62e SHA-1: ea67b4f7f3692a39a160a66b3c459fe6720ecb0f SHA-256: c9973fc83c5b01a722549db70fff73b59309d7cd2bc27f4bb7e322aafa772681
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure, impersonating brands like Facebook, to trick users into clicking malicious links. The primary link, https://netcdn.online/app/406889139/coin-master-money-hack-game-hack, is designed to lead users to potentially harmful content or credential harvesting pages. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/406889139/coin-master-money-hack-game-hack.
  • 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-money-hack-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tiktok-free-view-kong_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005393.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5393 24592 bytes
SHA-256: c6a362bd6c2b3478441cb4ddaa31d9c36949a8ca0b4f9b10c88579b87b24d89a
font_01_sfnt_off00008bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 2944 bytes
SHA-256: 06c0323016b6b02ad316e898f05517d621c65dc58604f3822104f87707123cfb
font_02_sfnt_off000095f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95F9 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_03_sfnt_off0000a811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA811 17896 bytes
SHA-256: a6b353828501ff7b1093da1228b83900f1f5af44564cde8da81e8d6550ac8b57

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