Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a96841968665e88…

MALICIOUS

PDF

48.6 KB Created: 2021-06-04 00:47:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 493bd8fc4d6a69841ad2171ebbcf8808 SHA-1: 155a8aa88b002ac2745f6dc947301fc98e135c16 SHA-256: 2a96841968665e882dd945d61f25856c9569dd9eb780f6d7fe795e0e055c3d4f
122 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, presenting a fake CAPTCHA to trick the user into clicking a link. This link, 'https://netcdn.online/app/431946152/free-robux-meme-game-hack', likely leads to a malicious site designed to exploit the user. The document's structure and embedded URLs suggest it's part of a phishing campaign aiming to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-robux-meme-game-hack PDF link annotation
    • http://biblioteca.ganexa.edu.pa/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-website_GM431946152.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5072 26656 bytes
SHA-256: bfd15b0ca45d60fff649005423f2f22e0fd837f88048e361d53375e81ea0149c
font_01_sfnt_off00008dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE7 18468 bytes
SHA-256: 3e6db3c9d7b90636a2057efa50536683edf8623f57b31e837fe721178fdf9957

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