Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e88861feef7e626…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 09:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c252acb9fd0be6469b3066674bc532d7 SHA-1: 1c0fecf8376cbba1869198db7c3fef8b73d2369f SHA-256: 7e88861feef7e626233f5dbc57343fcd53deb3284b82f6dd17d6b29532443dfd
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 0.9864

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.tw/app/431946152/como-vestirse-hackear-roblox-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/more-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/youtubers-that-give-codes-for-robux-for-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/i-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-earn-free-robux_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
stream_004_off000050d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D9 25788 bytes
SHA-256: 54290e4b00ea0a5107779a082ca29899f57a5a1673e4c52309e85defd8bde2d7
font_01_sfnt_off00008d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0A 18800 bytes
SHA-256: 354fd9ffad7bf84618c24710ded172afbc1626a99ec410b4f5ffc550a18afd64

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