Malicious PDF — malware analysis report

Static analysis result for SHA-256 72832ddebe06c647…

MALICIOUS

PDF

43.8 KB Created: 2021-06-08 17:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b35ecae7bfef21ca5b7930a71941fc7b SHA-1: 6a31f119254bb7ecb6c3b9efb2d83338057510bf SHA-256: 72832ddebe06c647eac06449e19ece1f284590d9a28dec111a063d851f6d7bba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free Robux' to entice users. It contains multiple links pointing to external websites, including one at `https://netcdn.tw/app/431946152/earn-robux-online-hack-game-hack`, which likely serves as a redirector to malicious content or a download site. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and embedded URLs.

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.tw/app/431946152/earn-robux-online-hack-game-hack PDF link annotation
    • http://autoskola-scp.com/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/spin-link_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/guild-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-facebook-hack_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/pubg-uc-deducted_GM1330123889.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-monster_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/pubg-uc-apk_GM1330123889.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-download-minecraft-for-free-on-iphone_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_off00004e67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E67 25152 bytes
SHA-256: 085d16538b6e9c90158404f680f4628a6b168a070a88c4ed6028d37704af9efe
font_01_sfnt_off00008841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8841 18444 bytes
SHA-256: 7fcc589b771e1163839cf7bdb047af90345a7712fa48fc7f353111a28c5c1d25

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