Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2deeaa120eddf10…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 13:38:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58f9b731015a8c08b228e1de91cf3da5 SHA-1: 6a8d251b4d0438793cf6bd5993dc0f0ce732aa90 SHA-256: d2deeaa120eddf1049494e33612384951aa314ecae9dcb61fef0f3cf41ef8b78
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure, presents a deceptive download button and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/free-robux-come-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/hacked-in-roblox-from-zia-lets-play_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/dragon-ball-z-final-stand-roblox-free-laevels-3_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/microsoft-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/awesome-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/biggest-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/egg-hunt-2021-the-great-yolktales-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/robux-free-co_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_off00002c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C88 22248 bytes
SHA-256: d1366c0ad76e5d5d89d504489cf6cd5a68a9e9408961f37e80daec37eb602b7f
font_01_sfnt_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 18976 bytes
SHA-256: 20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c

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