Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5c00978cb13ac7…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 17:58:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9471a3b21242596c70ab23707b220a4f SHA-1: 841e089b65a896b8887bad4cd1d41ef371f52274 SHA-256: 7e5c00978cb13ac79544ed1fde6cfc76742c97eed4c1f03dcdc08d236984e126
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are lures for game hacks and free in-game currency, such as Robux and Coin Master spins. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-no-survey-2021-game-hack, is directly linked to a 'free generator / game hack' lure. While no scripts were explicitly extracted, the nature of the embedded links and the 'ML_NYX_PDF_MALICIOUS' heuristic suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-robux-no-survey-2021-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/login-to-tiktok-free_GM835599320.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-watermelon-shark-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-free-passes-on-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/prison-life-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/how-to-get-the-riding-pass-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-skywars-mega-vip-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/vechile-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-dump-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-100-allways-working-2021_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_off00002b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7B 22784 bytes
SHA-256: 603b152a58ca20ebd885e512672cd00b13afe8e997fbaea8e3070533f17ba770
font_01_sfnt_off00005e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E87 19680 bytes
SHA-256: 609248b5f66d751bcc5a5b8b471e91e136927359eb8a223f3c9d553a85ba99e8

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