Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd8f8c3d1b6d94b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 22:52:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a9ecb89bb81fc8f9b95af8867f36411 SHA-1: 1f6f10e6135c93fe268a2bc29e7620f9af7fdbdd SHA-256: bbd8f8c3d1b6d94b5288b35adc2137a7ecfef0e3bc0473723e92467dcbb8299c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically for 'free Robux'. The document body and extracted URLs reinforce this, pointing to sites offering generators and hacks for popular games. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack, is likely the initial landing page for a phishing or malware distribution campaign.

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-free-robux-without-verifying-2021-game-hack PDF link annotation
    • https://privatearrangements.co.nz/public/files/robux-game-com_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-limited-offer-game-answers_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/robux-hacks-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/nuke-hack-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-cheat-on-boxing-simulator-2-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-jailbreak-hack-download-mobile_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-skins-on-coin-master_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_off000031b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8 21932 bytes
SHA-256: feefb1de044059e2506bb78934933daab41d68d359dfd5b1bc97bdda244786f2
font_01_sfnt_off00006246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 20184 bytes
SHA-256: da7d406aba47eea6317da3ede96973437af681d442b83efbb40dfbc95f86b21f