Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eb55c77dbca241…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 19:03:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 94485d2561f0de0009413e32af86c55d SHA-1: b40ced99e6b5de04cf6883d3cf543a6bc3680765 SHA-256: 63eb55c77dbca2413011b5e292a367568250d1bbbfd46aa044c85f1431ff099b
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/roblox-free-play-download-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/roblox-free-pink-hair_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-execute-script-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-merch_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-surf-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-in-your-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-join-someones-game-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-id-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-gamepass-scriopt_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_off00002e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E24 22476 bytes
SHA-256: 4bea39acab95ea8a99b41acd89cff99fc924c11cfaf70485d73935729cebbd41
font_01_sfnt_off0000603b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 19488 bytes
SHA-256: 6e79ca3612e29a1b804ea8bf3a27d9cf4d47752628b4edc2584f5e9adec6e6f5

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