Malicious PDF — malware analysis report

Static analysis result for SHA-256 5913ff187d7e623b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 01:57:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 242ebdf3c0165ff5ea89a09503628cda SHA-1: 85e8c3ef80709a99f9f1c25db3d12fc20d1aea48 SHA-256: 5913ff187d7e623b3057f211fd3cb9160a6ee25306e8cfe9f49a3a61d98518e6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that are designed to lure users into clicking on links related to game hacks and free generators. The primary URL, http://netcdn.co/app/431946152/roblox-studio-script-hack-game-hack, is directly linked to a 'game hack' lure. The document body, though partially corrupted, also contains references to these lures and the malicious URLs. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/roblox-studio-script-hack-game-hack PDF link annotation
    • http://autoskola-scp.com/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/robux-hack-2021-website_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-so-sick-free-card_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/can-roblox-determine-the-ip-address-of-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/pubg-uc-carding-quora_GM1330123889.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/hackear-roblox-pc_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/como-tener-robux-hacks_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_off00002e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E28 22044 bytes
SHA-256: 2ffc95a886f44320116bb719f6a9a84223e59ebf7b7598cd8696d0d2a33ffde5
font_01_sfnt_off00005eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB9 19368 bytes
SHA-256: 3bee3f707f2f8700569ab6ac3ac3c3fdf0ba24002cea48c9b8247f10283e9903

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