Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70634ff47b98d32…

MALICIOUS

PDF

49.7 KB Created: 2021-06-03 22:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8f4e8102bfa672ee118c5de722db7479 SHA-1: 3e253277bb649cefb3399dfe0890f82b8968def5 SHA-256: f70634ff47b98d32777f5f6e3143595a6c17dcb0dcc694f1a762b72f5f848c21
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9796

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 https://netcdn.online/app/479516143/minecraft-skins-free-girl-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-client_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hackear-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000534f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534F 31036 bytes
SHA-256: 2fe5233e95374b2612d077bbc6200a6e2f89c686963a1057a2857241efe1e800
font_01_sfnt_off000097a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A6 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000a146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA146 17812 bytes
SHA-256: 7ce5d1bffc067a7697c6659b9f16d2693dfb8cdcb2edfb00fbdf7ce9282af41c

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