Malicious PDF — malware analysis report

Static analysis result for SHA-256 87e74beb37268cbc…

MALICIOUS

PDF

32.6 KB Created: 2021-07-05 17:41:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bd45be0b5372d6b91bcac351760355e9 SHA-1: 0c367f84edb7ec4fb4da0483e30013a17ffada92 SHA-256: 87e74beb37268cbcbfba12db019b1cb4743a9cf3e16a47838f7c4333559bbe6b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9824

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/431946152/free-robux-just-click-game-hack PDF link annotation
    • http://library.thamrin.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hack-for-fly_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-unlimited-robux-apk-free-download_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.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_off000029cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CF 21844 bytes
SHA-256: c87506a5a2b00314e8573c0219318758792a2929a710f14743eceecff31ebd5d
font_01_sfnt_off000059e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 19348 bytes
SHA-256: 8163eefe55d2b716894bab3fbbbe5b67835ea43b9ee71dd429e67fe46c72f214

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