Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c99ac37a51d527…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 06:15:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9cd8012ec67e472b193176b80a5f4904 SHA-1: 18d4e2922846d08c3739242f304561db019fe968 SHA-256: c8c99ac37a51d5271a8c13fbcba58ef9c9180f654628c238d818cf5524021a33
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to game hack and free currency lures, such as 'coin-master-daily-spin-link-app-game-hack'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-daily-spin-link-app-game-hack. This suggests the document is designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

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-daily-spin-link-app-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-2021-no-verificationand-no-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-video-no-password_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-hack-no-scam-robloxian_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-retail-tycoon-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-hack-loaderexe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coins-coin-master-link-today_GM406889139.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
font_00_sfnt_off0000332d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332D 23188 bytes
SHA-256: 5420a8eb1d52b111ed2cde5426c28106bdb28c0fad169e4fe041e19327c772fb
font_01_sfnt_off000066cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CD 18600 bytes
SHA-256: 60b554495ea60e6ca53b5369020bf67ce1a3de56c6822e7c5cc2b7202eefbaf9

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