Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a2f731e752488e…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 02:27:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d332cc28bd635b1dac7b1b3fadbaa7ad SHA-1: 394f02a72c349a00f180cc47e2cdf47e600c46d4 SHA-256: f1a2f731e752488e99d53c51385ee0efed0c6464fa2c3db2dde12cb0cbb129d0
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and free currency, directing users to the URL http://netcdn.tw/app/431946152/how-to-get-roebucks-on-roblox-game-hack. This URL is likely part of a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to deceive users into visiting a potentially harmful site.

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/how-to-get-roebucks-on-roblox-game-hack PDF link annotation
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-hack-through-walls-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-accounts-on-roblox-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-on-ipad-ios_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/porque-no-injecta-el-hack-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/best-free-rp-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-items_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-assassin-cheat_GM431946152.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_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22132 bytes
SHA-256: 77b851149b655ba57a74f093cf7d6fbe6b351e1920e6fda1b4c6c7156fddc427
font_01_sfnt_off00005f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F54 19064 bytes
SHA-256: 82c5802a09591ba003f30b2ef784a2aef7810aafb21a336fd5950709cacc2376

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