Malicious PDF — malware analysis report

Static analysis result for SHA-256 923760750d0e6d5c…

MALICIOUS

PDF

44.3 KB Created: 2021-05-19 01:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5ad70bb35080b6e3eaac1c1c6f632475 SHA-1: 73f3cc3f0f65c5eb81dc9ceb11cd7198db6fca08 SHA-256: 923760750d0e6d5c1559ffe258efb77f6f1f2c350f560e27880dcef6927b22c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'Coin Master Free Spin' generator, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a potentially harmful external site for further exploitation.

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 https://netcdn.xyz/app/406889139/coin-master-free-spin-whatsapp-group-game-hack PDF link annotation
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://elearning.man4madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_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
stream_003_off00004d2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2F 27024 bytes
SHA-256: be7c4e1de89f13c9d94fefa0711427afc6a542e32192e7df748a654645bad6c6
font_01_sfnt_off00008ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC5 18392 bytes
SHA-256: 60a6361e6fc3388894d0b11e150a687c52e9f5db442fe66c80805b9ea3a4dad4

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