Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e940be252b0f98…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 20:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4c2955e26403bd408c1d32cac591e49f SHA-1: f10e2de57543f3b91d374c361b8f3995060e8094 SHA-256: 58e940be252b0f98d885a2dd05de0662204fad4fa62138694478daa2c925f308
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, with a primary focus on a 'free generator / game hack' lure. This suggests the document's purpose is to trick users into visiting a potentially malicious website or downloading further malware. The ML classifier strongly supports the malicious nature of this PDF.

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/479516143/free-minecraft-server-hosting-24-7-game-hack PDF link annotation
    • http://ycstamping.com.tw/image/data/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-win-no-survey_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-cool-marshmello-shirts_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-password-easy-obby-june-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-free-builders-club-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-mobile-cheat_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/easy-basic-hacking-engine-for-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-roblox-with-ihax-games_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hack-apps-download-pc_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-adder_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_off00002fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA8 21892 bytes
SHA-256: d25b2419b172e663563b601fa81552ef4679546134cf50a2ea75cb73958860e8
font_01_sfnt_off0000601a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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