Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca5ea6fc91d2cac…

MALICIOUS

PDF

34.9 KB Created: 2021-07-19 13:52:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 910b7ec246d9050ba7b8f7b9680ee4d0 SHA-1: 13c8e0dafb3298b0c9a268159c9f423b51be34c0 SHA-256: 6ca5ea6fc91d2cac438eb1d7c10d835ad24a1c95605128fbcc69d36600f35247
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 0.9962

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/coin-master-free-spin-and-coins-links-game-hack PDF link annotation
    • https://ai-appenzell.ch/images/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://ai-appenzell.ch/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://ai-appenzell.ch/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ai-appenzell.ch/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://ai-appenzell.ch/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://ai-appenzell.ch/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://ai-appenzell.ch/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://ai-appenzell.ch/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://ai-appenzell.ch/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ai-appenzell.ch/images/coin-master-free-coins-and-spins_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_off00003381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3381 22924 bytes
SHA-256: 9137fe10c5635c62ac14164de38979ededcdf5261dab08dd1a33675860fc7589
font_01_sfnt_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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