Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b62b37d6d9e723…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 03:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a04cb8c53c92f81caf8109c8b6e3c389 SHA-1: 8a6171b7493a80a4b5046dbe4c8e5d3c04ff8051 SHA-256: c3b62b37d6d9e72327eb66a43effa5af0ea4da607e5633a4b4552b832a6a2c73
82 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to a URL advertising game hacks and generators. This lure is designed to trick users into downloading potentially malicious content. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-hack-gui-download-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-skins-pe_GM479516143.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
stream_004_off00005061.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5061 25824 bytes
SHA-256: 0913422e66672af3193417f8ccfca863f4e3173ae6834b7edbd4bb1757e6f438
font_01_sfnt_off00008ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA0 18948 bytes
SHA-256: c4c4430f79809d4994c2a86f4ca0a695206ad47784c5446d2e9164a9fcb49a3f

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