Malicious PDF — malware analysis report

Static analysis result for SHA-256 08212f49e0ba7356…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 13:42:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e830bb12f8d91a69cdabf661ab0e3a80 SHA-1: 1046f44d598be9b85939716765ab4cb1d97c261c SHA-256: 08212f49e0ba73564ffdbe2a86a4ad8cbb59ad0b9e79086a892c516a0f2faac4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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.co/app/431946152/do-you-want-free-robux-copypaste-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-giveaways-top-hack_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-create-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-game-hack-kaise-kare_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
stream_002_off00002ec5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC5 22620 bytes
SHA-256: 3fde354e2fef2a77d19ffafbdd9ed8f1e79feb4e8be446a633205363cbea828c
font_01_sfnt_off0000613d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613D 19704 bytes
SHA-256: 7ff82b49b46080dd84b48c07550b93b02ba261fdf8b7539b5c622fd2b7dc749f

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