Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35ca025173a6eba…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 01:10:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c5256b21662d1183ca972c8bce0ff23b SHA-1: 6c44e7ebcf35c7983cab2295a56a01d1cb4f95fd SHA-256: f35ca025173a6eba72c0e6d49dcd43fa4f1a4e22be4bc38c63799e7da6b60e7a
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/robux-generator-that-works-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-use-process-hacker-for-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-superhero-bundle-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-offer-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-download-free-windows-xp_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-make-items-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-hack-free-money_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_off00003146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3146 22152 bytes
SHA-256: 8dd4613997b909b8e3fa0e6251e699091f8b8854516d0e3bc6385c36bc9eb4aa
font_01_sfnt_off00006249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 19188 bytes
SHA-256: ccc77926c6d9f36711ba9a2232d7c5723157e500c42e1f45c9b9e4f6db9b0194

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