Malicious PDF — malware analysis report

Static analysis result for SHA-256 799f78cf07cadfc5…

MALICIOUS

PDF

45.7 KB Created: 2021-06-11 00:54:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c065ad63d720851020acd5af46b61f5e SHA-1: 289bae6269a0b87be19d83871d1acc7129a776b7 SHA-256: 799f78cf07cadfc50a15ad257c3196ce1a28f291cbdd8df7698263f847ce412a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a fake CAPTCHA lure to deceive users into clicking a link. The linked URL, 'https://netcdn.tw/app/431946152/how-to-find-out-who-hacked-your-roblox-game-hack', leads to a site promising game hacks, which is a common pretext for phishing or malware delivery. The document also contains numerous other URLs pointing to similar game-related lures, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/how-to-find-out-who-hacked-your-roblox-game-hack PDF link annotation
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-hack-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://rsudtenriawarubone.com/perpustakaan//repository/coin-master-free-spins-and-coins-link-blogspot_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
stream_004_off00005201.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5201 25164 bytes
SHA-256: 94ca170233901b7031fdf302d49cb6f757476615682126fbb8b590bb71bd8c8a
font_01_sfnt_off00008c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 19572 bytes
SHA-256: 43dbc2bd70d78bc7d889bed84a9b57541be35a9b11ceb81d226dbbdd6bce12f8

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