Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd662bb3155a0a59…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 23:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 749f8d0c9f82b5aef16cf774dc02ab3a SHA-1: ab2feb8c26e6481f491af3df4a33f4be66fe2d15 SHA-256: cd662bb3155a0a59fd6bd09c6a6dd1a3411c42980798a315188c95d4b88d28c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/free-robux-sites-that-work-game-hack PDF link annotation
    • https://www.dahu-villa.com.tw/upload/files/how-to-hack-other-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/kill-hack-roblox-work-at-a-pizza-place_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-to-look-like-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-to-get-free-robux-glitch-with-only-inspect_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-nike-free_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-human-verification_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
font_00_sfnt_off00002fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBA 22488 bytes
SHA-256: be39fed2d8e69274541e091e0c0143ab790b2bf92b50d4553ad0e4914ce425e1
font_01_sfnt_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 19472 bytes
SHA-256: c870e848b7333530fcf3a181653402c0177c63a978227bac510a2a158669bcb4

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