Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df9cba8bc8ea4d5…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 01:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 52250b17f4ab6310fcf2f545aaae6153 SHA-1: 8a557a471de3b19131394e4fdbc3f5d266424c31 SHA-256: 7df9cba8bc8ea4d551673b5e903eb41d5339fbb28a00a85ec2adb5d0dc6a6bbc
82 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free in-game currency to entice users to click on malicious links. The primary link, http://netcdn.co/app/479516143/minecraft-18-9-hacked-client-game-hack, is directly associated with a high-severity heuristic for game hack redirects. The document body and numerous other extracted URLs reinforce this theme, suggesting the file's purpose is to drive users to download potentially unwanted or malicious software.

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.co/app/479516143/minecraft-18-9-hacked-client-game-hack PDF link annotation
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/nonsense-diamond-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/how-to-hack-prison-life-in-roblox_GM431946152.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://brooklandsfarmchildren.co.uk/admin/ckfinder/userfiles/files/download-apps-for-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_off000033aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AA 22220 bytes
SHA-256: 7de1e6fe543591e22b1f9819ae17bfccbf0befba076d4d340d3bbcb1df1226b5
font_01_sfnt_off0000650f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 18756 bytes
SHA-256: bc7ce539429de417ba0394b3a553ba382b302f8472751b99fb4c21ca42080eae

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