Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7026b11db2d28d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 02:50:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 79eb5dfa660715bf2cee18dfdab965ab SHA-1: 126ebfe7bef5fba25f8c24e29ea84fbeeea87d88 SHA-256: 5f7026b11db2d28d947fcd6eb45ab8ecd70c705ea4d926853f3a2cd589977862
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/431946152/free-robux-generator-for-kids-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/site-pour-hacker-les-compte-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-clients-2021-aimbot-island-royale_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-admin-in-roblox-life-in-paradise_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-phantom-forces-hack-dll_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-spins-for-coin-master_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
font_00_sfnt_off0000313b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313B 22372 bytes
SHA-256: b2fd20b01a1a2aa800af99bfc8422a2c979e4bc3faa8babc6492a85faedcabe4
font_01_sfnt_off00006303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 19112 bytes
SHA-256: bfd1a83f6845c5ddf7ed6c77f5c6ea2f08ed895d31f12c1f792f1c6eedabde29

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