Malicious PDF — malware analysis report

Static analysis result for SHA-256 315ebba865f29d7f…

MALICIOUS

PDF

35.4 KB Created: 2021-06-24 23:40:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 824b567a99690e8294b850fcb3b2963c SHA-1: cc11f310267156014d779165ebb71933be6d68a9 SHA-256: 315ebba865f29d7fa26e186653cb4ba8370d5cbc5342a91a69c210e47034a337
82 Risk Score

Malware Insights

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

The PDF document contains embedded links that lure users with promises of free game hacks and currency, such as 'free Robux'. These links redirect to external URLs, including http://netcdn.co/app/431946152/www-roblox-tv-free-robux-game-hack, which is likely a malicious landing page. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of a malicious payload or exploit being delivered.

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/431946152/www-roblox-tv-free-robux-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-promo-codes-roblox-may-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-get-free-online_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-bc-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-hack-apocalypse-rising-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-blood-and-iron-music-changer-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CF 22716 bytes
SHA-256: b96dc7ba259d20eab8fdcece74782e700bb47441bdaf000ac7567a756335b219
font_01_sfnt_off00006487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6487 19268 bytes
SHA-256: 7b1b2c7231e4d6cdc4e0de5dfff3b7f83cf901b85e4a8f9cdd07f77325015c87

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