Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e958f7e80ff77eb…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 07:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 474271e4f652dbe7c6f3ee143e2abc8d SHA-1: b91a188d3f0ad839dcbb0a9cbb0331b68eadb2b7 SHA-256: 3e958f7e80ff77eb7152793adcfe6f6abfe6e325065e874ed93c897337be8daf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for game hacks and free currency, directing users to the URL https://netcdn.online/app/431946152/free-roebucks-no-human-verification-game-hack. This URL is likely a redirector to a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a download button lure further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.online/app/431946152/free-roebucks-no-human-verification-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-ninja-legends-hack-pets_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-2021-free-spins-link-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_004_off000050b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B8 31136 bytes
SHA-256: ec33f2766de278e05621b34adde4b0bf3093dca5d4374f3ec1344c920dee4349
font_01_sfnt_off00009795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9795 18820 bytes
SHA-256: 1447c24cceb474c5194c4b2a8fbd4af62b23628983510dc8b85025e556778538

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