Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c813082685d4f57…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 01:03:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 95731c61fab592c7852b38b2da3a5728 SHA-1: 100d3258ec0888ee59b7cbd34ef6203c870f1791 SHA-256: 4c813082685d4f57214e2c472647e16a21cbdb7c99b834860ba87ed6d45c2352
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.xyz/app/406889139/download-hack-coin-master-apk-game-hack PDF link annotation
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://perpus-untagsby.web.id/library-untagsby.web.id/repository/coin-master-apk-mod_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
stream_003_off00004e74.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E74 30140 bytes
SHA-256: 062b99e5df1734440469a06ab122bae843e3fcbc72f2fde4bbe002b3ed2700cd
font_01_sfnt_off00008b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B83 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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