Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b39775dc55b914e…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 12:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5dc6f770b0f74914e059d21d530d5440 SHA-1: 3bc28f8f88e54edb26502cf2779a3e4d747eb2d7 SHA-256: 4b39775dc55b914e4f18ffe90fe58791b7966770cf5396073c4f53f60e476cc4
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 0.9971

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.xyz/app/431946152/free-robux-hack-us-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-bedrock-edition-pc-download-free_GM479516143.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_003_off0000494c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x494C 24944 bytes
SHA-256: c70aa3bcfa409372a3b2d33b78358da28876b0e0de4c4e2ef9b7db3c96a01d03
font_01_sfnt_off000082f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 18600 bytes
SHA-256: be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b

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