Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8db8f1b1f52673…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 22:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 69361333037bee7125f94afa72be3853 SHA-1: 363b5269237492cc81cb8fd7c6ce1938fa01fbcd SHA-256: 5b8db8f1b1f52673c961751b05212454b88b744400c75dc2045aceeb78760821
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and links to a URL that appears to be a generator or hack. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics indicate a redirection to a malicious site, likely for phishing or malware distribution.

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/give-me-robux-now-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/ninja-legends-hackauto-farmer-free-op-swordroblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/what-roblox-games-has-no-cheating_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/5-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-hacked-roblox-accounts-back_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-arcane-adventures-cheats_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/hack-de-roblox-sin-virus_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-spin-coin-master-hacktoman_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_off00002f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F71 21616 bytes
SHA-256: 4e27403a08fdd52c90e9a643baa4218568160ead8f915dcb2a285fff614aec65
font_01_sfnt_off00005ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC6 19144 bytes
SHA-256: 4e2a3ce40f10caa3e5ad6ab7b54716fa6c0edc928f953ee2f302d526ca99eef3

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