Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54e254ea0936ded…

MALICIOUS

PDF

44.2 KB Created: 2021-04-27 14:53:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6d8a6f5051c78a8d948eb8bfab9f63f2 SHA-1: e3e5c8abacd1266b4497574df38d6fc1f4cf31a5 SHA-256: d54e254ea0936dede854e3f910d0ca0c76fd1316bbab51ccdc681783086eb1c6
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 0.9868

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.xyz/app/431946152/roblox-gift-cards-free-codes-2021-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/game-empire-tycoon-roblox-hack-script.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-a-private-server-in-roblox-for-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hack-roblox-2021-youtube.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-stuff-on-roblox-mobile.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/moon-tycoon-roblox-gives-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-free-headphones-code.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/robux-hack-no-human-verification-android.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/daily-free-robux.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-hair-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-login-free-account.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_003_off0000410a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x410A 25872 bytes
SHA-256: c4ccd4d2aba3609f0b6e818d66c4064b7944d7373b002279868f13eb42702f0e
font_01_sfnt_off00007d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 3312 bytes
SHA-256: 40bd8eebcb3a0d68a8646f1930e84f30a44bfa48525263c6c528f0bc1e9c1677
font_02_sfnt_off000088b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88B0 18976 bytes
SHA-256: 9e7ba305884ded0ddf4da9e12687e35756e277d244a765f6eafd5e0c76ede6be

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