Malicious PDF — malware analysis report

Static analysis result for SHA-256 4387622448d81d7f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 02:32:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b75da873c7a02be3faa0c4dff1f8f41f SHA-1: d948c10811087bb411e0b7ac474fdf909a663b88 SHA-256: 4387622448d81d7fffd7973e216f80797e8279c08ed924b850b894014b9ace43
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are disguised as game hack generators or free item providers for popular games. These links, such as 'http://netcdn.co/app/431946152/roblox-free-clothes-generator-game-hack', are designed to trick users into clicking them, likely leading to malware downloads or phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the lure-based attack pattern.

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-free-clothes-generator-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/adidas-free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-cards-link-2021_GM406889139.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_off00002f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8D 22820 bytes
SHA-256: 8ceb9ff90eb57a7e3b8697ccdd5f415c396b86581510f4c41578941012d64476
font_01_sfnt_off000062b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B0 18920 bytes
SHA-256: 168b44f383469b980ccfd12afc6a57c15e96a954b5575884cb06f059eb884acb

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