Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80141248bb0b40e…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 16:20:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4622b3907a5af7cd3226721c7b19bb22 SHA-1: 09a283d9bdde2b6208acc3a634367ef8c16b159f SHA-256: b80141248bb0b40e000452deb08b083d7e63f79a5c039c84a21a6758d2a1aa47
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9971

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.xyz/app/431946152/free-roblox-clothes-2021-game-hack PDF link annotation
    • http://www.thecoffeebaron.co.za/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/what-is-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-hack-download_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
stream_003_off000048b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B9 25112 bytes
SHA-256: 6601361ac524d81269ca2536f1812be091a8c0465da83b79e8eb7d93b6f584dc
font_01_sfnt_off0000819e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819E 18620 bytes
SHA-256: 252330d33e31022fb4da09489f6402f078bd49276604afcef68628ac91e42d16

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