Malicious PDF — malware analysis report

Static analysis result for SHA-256 857e2f6ffae7ed9a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 23:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 352036a40c4a1d1edd05c54c23076707 SHA-1: ab08dc0afcc99ba7cea302a0f08ac490cbd43797 SHA-256: 857e2f6ffae7ed9aed413d21f58881a83d4fec6bdfa6d60d7ab2412352c0af00
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing indicating it links to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this, with the primary URL being http://netcdn.tw/app/431946152/robux-free-com-game-hack. This suggests a social engineering lure to trick users into visiting a potentially malicious site.

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/robux-free-com-game-hack PDF link annotation
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-roblox-accounts-with-1-million-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-roblox-redeem-pins_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/roblox-free-items-2021_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_off00003137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3137 22700 bytes
SHA-256: 029a97f2956e7f477912c6f4d5667f9aa9f4080dd158a6553dceeb735e9adf69
font_01_sfnt_off00006432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6432 18976 bytes
SHA-256: fb86ad1aad47c5a5c5fa913efd771066ff8edf92cff8bf075126ed023f1935f6

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