Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba0fa55b5762e0a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 02:14:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2bf46b8f7fd2ff1332c1bb978331ab9d SHA-1: d3d9f54eb5c58b1013640afaa616c673bf3e3944 SHA-256: cba0fa55b5762e0a613d20eb00f2a94ab55cc9488daa1d293665bc3c4c9ccd74
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-roblox-com-game-hack PDF link annotation
    • http://global-brand.net/userfiles/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-roblox-account-with-2021-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-cheat-in-dna-on-ds-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/get-robux-now_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.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
font_00_sfnt_off00002e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E65 21976 bytes
SHA-256: 72ae437e29583e7d43232dcd42b02d5206427b2c89eabd3e7ae2801acdddba62
font_01_sfnt_off00005ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF9 18908 bytes
SHA-256: d440ae50c89bf21c2d7cea83ae76656b5c1e07e58309934906c6eda36fd94443

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