Malicious PDF — malware analysis report

Static analysis result for SHA-256 42923e592c355b6b…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 13:52:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: abb446fd4745d40784ad08e5892847cc SHA-1: 6f0ddb8d87a72661c5aa30a56745452b6e85740d SHA-256: 42923e592c355b6b2457076622b38773773f0f695ed320fc5246206d853b6146
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA lure to trick users into clicking a link for 'free Robux' or game hacks. The embedded link, https://netcdn.online/app/431946152/get-free-robux-now-game-hack, likely leads to a second-stage payload download. The document's structure and heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/get-free-robux-now-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/who-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://rblx.landIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fd4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FD4 24772 bytes
SHA-256: ea1ae37605db9607d52507d412d3755adce4d675fd11a09f4f8b468a2378b11a
font_01_sfnt_off00008914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8914 18280 bytes
SHA-256: 538c9dd0db01d2f7ccbac1c4b1e59781ee6b2d24c7879b3cb67aab50807a8027

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