Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d37caff10624d51…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 20:57:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1feca573f85535a994e9665b643d65f SHA-1: 4578526bb69665a4916f2daca425e04bd21d602e SHA-256: 9d37caff10624d51957f22fb2abcb1bc0639af9d1a41ca63897236745f684026
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lure users with promises of game hacks and free in-game currency for popular games like Coin Master and Roblox. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-daily-links-game-hack, is flagged as a game hack redirector. The document's content and structure strongly suggest a social engineering tactic to drive users to potentially malicious websites for downloads or credential harvesting.

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/406889139/coin-master-free-spins-and-coins-daily-links-game-hack PDF link annotation
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-robux-not-a-scam-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/synapse-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/youtube-have-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-be-a-parkour-ninja-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/best-app-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-rs-cheat-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-hack-back-a-roblox-accunt_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-pc-free-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/code-roblox-tokyo-ghoul-2021-free-rc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/get-coin-master-spins-free_GM406889139.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_off0000322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322C 22804 bytes
SHA-256: f069630fba585b09c59c20943318c8c6b649df2b8cb77d36328cc8e145313aa5
font_01_sfnt_off0000655f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 18940 bytes
SHA-256: c0dcd974f4fe980c6a922a1d67dca4592269afdacb350ab691b189b4ca5ba35f

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