Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11e9154958180b3…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 22:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0169e6c6e613cc26e6419c9293d7cd9a SHA-1: df649ad9aa9fabff6864057dbf326d1534d19864 SHA-256: c11e9154958180b375b6bb740b8885d85b429e9304dfde06fdfb01f7b961cd61
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/406889139/free-card-collection-in-coin-master-game-hack PDF link annotation
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-monster_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coinmaster_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://bcnph.ac.th/webopac/assets/filemanager/files/free-coin-master-spins-hack_GM406889139.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_off000032e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E0 22876 bytes
SHA-256: bd6815b821c78b512c73fe74cab0cc1f3e20b6b9015583716adc59df2800aec2
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 18244 bytes
SHA-256: f83f39971f031133d9ac19f4d0176cfde7e71f4c6078ff94cde1d0a05c77e137

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