Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb74c85d92ec0403…

MALICIOUS

PDF

46.5 KB Created: 2021-06-09 04:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f790c78008f0bfdb7396eb075621d81b SHA-1: 1e44258355d9e188120e1dc99d36b7ddb297af9d SHA-256: eb74c85d92ec04031ba3ce67d6c978e025708f1f060ba91a3f5f1c4276c78cc5
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 0.9682

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-hack-high-school-life-roblox-game-hack PDF link annotation
    • http://eurosystemssrl.it/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/robuxlive-stream-robux-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/cheat-roblox-lumber-tycoon-2-pc_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-do-you-get-free-rs-on-roblox_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://eurosystemssrl.it/images/como-tener-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://eurosystemssrl.it/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5049 25228 bytes
SHA-256: 2a0b4fdfa582510cf22dbc3f8fd93f264c09c65c7107caa2e7c52748c573075e
font_01_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9114 18920 bytes
SHA-256: 0ef149a41b75b27372dc65ebae4d3def4000e816ab09eb7ed57b5e36b31db522

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