Malicious PDF — malware analysis report

Static analysis result for SHA-256 744b3510f276b807…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 06:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 19f3245c5829e337e766f2414ca356da SHA-1: 8106977e2be256f70a6d79dad7ada82a5f61a400 SHA-256: 744b3510f276b807d4ca5705ba606fd7785700a37b0a6af1afd962b5b68becde
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 0.9865

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-obama-t-shirt-roblox-game-hack PDF link annotation
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-youtube-tiktok-dance_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stieppi.ac.id/repository/toolbox-for-minecraft-pe-ios_GM479516143.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_off000052b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52B4 24944 bytes
SHA-256: 5a8773bcc22571ebd77e1e6bb5b3daa16a8586fc57c3a450dbf8c10d27b3bebc
font_01_sfnt_off00008c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C45 18828 bytes
SHA-256: 549779259fc7c95bb6e683ef0da9b1b7e5667513c82778d79e4afdd82e5ccec5

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