Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b1a5b9d7f18a6d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 13:23:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5f4e227a83b3ce8d13f5ab4e8e14e7c0 SHA-1: 15a25a89edbf23a180dfb3b656cc8e6ad0407add SHA-256: b8b1a5b9d7f18a6d8088391912d01638e9c021ec0d128b3a4219f34745f52a21
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.tw/app/406889139/free-spin-hack-coin-master-2021-game-hack PDF link annotation
    • http://global-brand.net/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/tiktok-free-skin-event_GM835599320.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/how-to-get-robux-free-2021-thai_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-cheats-of-xbox-one_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/donate-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/roblox-logo-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://global-brand.net/userfiles/files/free-hack-on-roblox-no-email-or-no-password_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_off00002f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F99 22888 bytes
SHA-256: 50576d610e03a772df13ab2164795d9031acb4befb1d540e84ef8a6ec42629db
font_01_sfnt_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 18748 bytes
SHA-256: 7df8ab728cdded3f8099f37aff2fc644c0b56c156b14cd18fe44a93e03dbf9eb

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