Malicious PDF — malware analysis report

Static analysis result for SHA-256 91826ad4baf2245f…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 01:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 13575e3e3f147ba3cba6d8b73d5938fa SHA-1: cb0e2ec9ccc121bacc57295f303ba3c0cfb0f322 SHA-256: 91826ad4baf2245f53eb2532e1610b19e1e60170733f4f23eb5e36715b7bd88e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to 'netcdn.tw' which is flagged as a game hack lure. The document body and extracted URLs reinforce this theme, suggesting the primary goal is to redirect users to potentially malicious sites offering cheats or generators. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to lure users into clicking external links.

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/406889139/www-coin-master-hack-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/roblox-cheat-engine-bypass-2021-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/pubg-uc-no-verification_GM1330123889.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-cheat-on-roblox-tycoons_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-without-human-verification-and-no-sureys-or-downloads_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hacking-gameq_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-modern-cafe-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/what-game-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-stamper-tool-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-the-scary-elevator-red-keys-locations-cheat-sheet_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3012 22588 bytes
SHA-256: 1cb8f9cbf82805a8090e6cfe381040864218e7135b9e689dacad20591d25d559
font_01_sfnt_off00006256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 18364 bytes
SHA-256: 56fe19c9a365f85bceb031ba69da7f92b878d4dc87b6111ff4a61486c3ab982f

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