Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ce4bb5203d4d3f…

MALICIOUS

PDF

36.1 KB Created: 2021-07-01 06:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4050ceb2c70d839a6cc39cbc40ee029e SHA-1: 8c3ddd326daa7c5cf59591d19a14291b94cca05a SHA-256: 97ce4bb5203d4d3f3c9e50032d2f7e8569f12fe81124301a588de1f486ad6913
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a 'free generator / game hack' which is a known malicious redirector. The document body and heuristics indicate a lure for game-related cheats, likely to download malware or lead to further phishing. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/hacks-roblox-menu-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/on-builders-club-can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-apk-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hacks-assassin_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-geaar-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/gear-online-hack-scripts-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-games-that-i-can-play_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-passwords-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/https-www-free-robux-com_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_off00003411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3411 23168 bytes
SHA-256: fde9f04b7d3d4643c7a210728b2423078bb3dbdac1388f8b4d65d97512b68fef
font_01_sfnt_off0000687e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 18992 bytes
SHA-256: e37fb2b5b6111282485d80fb53a18c721a110869b29bab5dd57240cdb80faee8

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