Malicious PDF — malware analysis report

Static analysis result for SHA-256 c521d53afca7973f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 17:48:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 98e4627ad38cbce56f48d6a2802395c6 SHA-1: d74dafac1643daf524727846f34563142cdf9125 SHA-256: c521d53afca7973fbe4bc3107946580d6e1b0aabe3367b38aaddafc133a5c63e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game hacks, specifically mentioning Minecraft, to entice users to click on an embedded URL. This URL, http://netcdn.tw/app/479516143/minecraft-bedrock-edition-free-with-java-game-hack, redirects to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the heuristic findings indicate a common social engineering tactic.

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/479516143/minecraft-bedrock-edition-free-with-java-game-hack PDF link annotation
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/trigon-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/upgrade-to-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/get-free-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/comment-hacker-bird-simulator-dans-roblox_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/hackear-cuentas-de-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/how-to-get-free-auto-clicker-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://www.kofordconverting.com/uploaded_files/userfiles/files/free-robux-come_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_off00003399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3399 22204 bytes
SHA-256: 76e59d3947401c886f4e6131ca802182999f6d50668a0bf406b4c69dc338f6c8
font_01_sfnt_off000064b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B1 19204 bytes
SHA-256: 90a52e35a77309da72f66e30604d3124f1652836c7ee3d665ece2cb7a8fd5b4e

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