Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb4435a09e2cec7…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 13:21:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 332782092d5d3202a04bc712480fad76 SHA-1: 9f869cb235db0cdf79374d8e3f1b81a14a06a2ed SHA-256: 3cb4435a09e2cec755011b74a9a6180ce04066d91721d11b0847e9a9cd6e0c7d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that lure users with promises of game hacks and free currency for popular games like Roblox and Coin Master. These links redirect to suspicious URLs, such as http://netcdn.tw/app/431946152/roblox-hack-codes-game-hack, which is likely a malicious distribution point for malware or a phishing site. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

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/roblox-hack-codes-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-player-speed-hack-script_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/omega-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/blooberry-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-guest-play_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/btool-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/currency-hack-roblox_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_off0000315b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315B 22364 bytes
SHA-256: 478700b5bc63fdd6d11570047e1279675ea50a878b8563d92045b3e4fe95bfee
font_01_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 18828 bytes
SHA-256: f26a990a68310c8fbc4066cf95e1007dcb6ef0a42f457348a493555e6997b3f1

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