Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca25510825a9c36…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 07:57:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8453d26dcaade899e5e769b852d24d11 SHA-1: b9588147abe25f2a463d6b8ea4fe7648e582eaf1 SHA-256: 4ca25510825a9c36234e81801295c09af50995517559b9b7134aa7d0783c9453
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The document body and embedded URLs reinforce this lure, pointing to sites offering 'free Robux' or game hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/oprewards-free-robux-game-hack, which likely serves as a landing page for further malicious activity or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/oprewards-free-robux-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F16 24704 bytes
SHA-256: 3713834d5e89894c302651ab65caf28b6a0725200a7e15ab426c1656fe17d9c6
font_01_sfnt_off0000879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879F 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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