Malicious PDF — malware analysis report

Static analysis result for SHA-256 421616dc06631fea…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 21:21:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 297df69664c316421285a8dd441fc287 SHA-1: d67aa2ac09ce3112ff960b2c33d2b87d73c4f5d9 SHA-256: 421616dc06631fea3c85abc577da7d34c93b9cbac62aa1bbeab9d9cdf55b9782
82 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 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 0.9980

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.co/app/431946152/free-robux-codes-2021-without-human-verification-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/free-roblox-pins_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-snowman-package-in-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/without-pokemon-go-free-evolution_GM1094591345.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/ww-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-free-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
font_00_sfnt_off00003059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3059 21980 bytes
SHA-256: bf1cef4cf93b9f0e6ee59a36021def95da42a6449d9d377f1c2ec1641db10f65
font_01_sfnt_off000060f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F5 20276 bytes
SHA-256: 165b01d49f1e14a2dcea3cb001b5bcd012a053e5000b329420b2db64b68fb3da

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