Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae193d8881d6cfa4…

MALICIOUS

PDF

46.3 KB Created: 2021-05-13 23:13:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a9532d7bc1092a0dbcd34ae82f3f4d0d SHA-1: cd9d06e26f466059ca06aaf2a38ad65e6b023b1e SHA-256: ae193d8881d6cfa41fe7b5b2931e2404a04ea4aeb647f5df9f4a93400e6aff8b
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 0.8696

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.xyz/app/431946152/how-to-get-800-robux-for-free-game-hack PDF link annotation
    • http://www.ck-ceramic.com/Public/upload/editorfiles/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-free-spins-blogspot_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
stream_003_off00004b32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B32 24784 bytes
SHA-256: 96889a939593251410abc6f4ea5074dfff1233aa8efc403645c9679851ae998e
font_01_sfnt_off00008419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8419 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000912b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912B 18664 bytes
SHA-256: 6a64e7471bea66bf256778f320a62da21f5461e8ce3828893f1d9cd09bca5c64

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