Malicious PDF — malware analysis report

Static analysis result for SHA-256 54779ab8db5baa8e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-08 06:13:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55506c0f5c7acf3484b4d67e2a39aaa8 SHA-1: 78a3c98da67627362967b4ed05c12751306f4b1d SHA-256: 54779ab8db5baa8eb62e0c27641a3780e35a1e9ad64b7f741dae4f6a3b84c6f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/2021-roblox-game-hack, is identified as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for JavaScript execution or redirection to a malicious site designed to deliver a payload or conduct phishing. The ML classifier strongly flagged this PDF as malicious.

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/431946152/2021-roblox-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-up-space_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-cheat-engine-rs_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-cbro-free-cases_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-coins_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/robux-hack-me-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/face-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/counter-blox-roblox-offensive-hacks-2021-v3rmillion_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/nicsterv-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spin-coin-master-2021-link_GM406889139.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_off00002f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3E 21644 bytes
SHA-256: 44b37f5a05b93fa8249352c5ff97280c907a0741cc51b83da40402e5c47652e6
font_01_sfnt_off00005ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBD 18888 bytes
SHA-256: 33ef63e005186671e8a4e4c52c6dbc977e36cf6478ccce69c93d79634960688f

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