Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b48ee6fc6d9aa0b…

MALICIOUS

PDF

53.1 KB Created: 2021-06-04 01:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 23d5e450d0e1bf58b157975da53a8ccd SHA-1: 4544396d87818d08928c54e13d95b1d78f700c6d SHA-256: 2b48ee6fc6d9aa0b6d6508eb376eb6ca7458cc1674632e75c8b3b89c8a621165
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 0.9616

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.online/app/431946152/how-to-get-free-robux-no-verification-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id//repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-free-download-online_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/best-way-to-get-free-robux_GM431946152.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_004_off000051eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EB 37088 bytes
SHA-256: 2f3a64812716aa068c548e547dcc5bcac64a7e2d850dae50a63c05cf3848469d
font_01_sfnt_off0000a1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DB 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off0000ab9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB9A 18764 bytes
SHA-256: a0d8f559ae1a84b7fc559fdee6dca3899797d6ff6e3d64572866459a8961df23

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