Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c51df56ccde52f…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 20:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d64b85d2ae2be236505242e7039b13c3 SHA-1: 23590fba5cf8b2510d665c2d05d91317eefcf4c7 SHA-256: 98c51df56ccde52fb0c2fff7e85acfac7525f7f651eb2f3087546b0bf9c2f379
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of 'free Robux' or game hacks. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically identifies this pattern. The document directs users to the URL http://netcdn.tw/app/431946152/www-free-robux-game-hack, which is highly likely to host a malicious payload or phishing page. No scripts were extracted from this sample.

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/www-free-robux-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/5-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/gg-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tix-factory-tycoon-paquet-tix-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-to-watch_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/there-is-no-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-tiktok-likes-75_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/sandra-how-to-get-free-tiams-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/make-free-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
font_00_sfnt_off000030de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 22488 bytes
SHA-256: d7f22efcb91fea2b2eb5c09fd65fd0328184c8cfe7a022287e9411000b1aff1a
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 19080 bytes
SHA-256: acf5ca21e1b57f7804790e88d3c8e797014eccbd964a564fa6b8ab1e1ef3ee82

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