Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b66566648a917d…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 17:35:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5cfca18ec4af96ae91dfffa6234bc1fe SHA-1: 4997130ec2f2840af07639ada62994a2f50e4b8c SHA-256: c2b66566648a917de9237911ff86b9e37a21c25a9253273448acc2f65ebe0273
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-obc-roblox-game-hack PDF link annotation
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-free-robux-game_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/game-that-accually-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/reddit-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/robux-simulator-lua-c-hack_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/how-to-make-a-cheat-on-roblox-roblox-studio-2021_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_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_off00003089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3089 21732 bytes
SHA-256: 71e27a8d98018b84881a82c9687291e877afdafe4c38d95e9450cc38c4fb0d6b
font_01_sfnt_off0000607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 18652 bytes
SHA-256: 1348d6f6ae832d96f1a82e2137bcaff65c2b0e3004013827095df8b36a295d4b