Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bae597a3401e882…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 05:39:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6d0d4c9d096d5ddc8c1186e40828a08b SHA-1: 6d8dfef93e7ffa122e7104b0183ad6130ccff05d SHA-256: 8bae597a3401e882e69e65f9cadba5dc2a2cda928896cfd0d911909853d6c632
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 0.9864

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 https://netcdn.online/app/431946152/roblox-free-robux-generator-game-hack PDF link annotation
    • http://global-brand.net/userfiles/files/make-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/pokemon-go-free-promo-codes-2021_GM1094591345.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/getrobux-info_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-free-robux-website_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
stream_004_off000050d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D1 27264 bytes
SHA-256: 917cded9975680d7c52631837d54c3fe6eacdd93a829d4ec99f55f908f6c5e81
font_01_sfnt_off00008e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E98 18420 bytes
SHA-256: 9bedda8babb487e8554fc45ae48be92d4657fab6cfffaa18de719644ed37071c

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