Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fed3295f42fedec…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 05:34:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0b9d38e6ef8dc122d1305800d9d4fc80 SHA-1: bd11f7ec19b74ec7c3e5a0dca90ccd8cf5b0beae SHA-256: 8fed3295f42fedece80a8fd27343683a69d31fafffb960ee1d61635d173dfc6a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a 'game hack' redirect lure, indicating a phishing or scam attempt. The document body, though partially corrupted, references 'Free Printable Roblox Coloring Pages' and includes links to sites offering game hacks and cheats. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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 http://netcdn.tw/app/431946152/free-printable-roblox-coloring-pages-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-online-games-like-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-promo-codes-for-roblox-robux2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-a-free-2021-roblox-acc_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-do-you-get-free-admin-commands-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hacke-made-city_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/lazyblox-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-blox-piece-hacks_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-without-having-to-download-anything_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-para-descargar-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-script-executor-lvl-7-roblox_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_off00003161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3161 21388 bytes
SHA-256: fb0cd663b7b6fb5cd9d26f3a4176e72ea1427f3b873a0d8e250999f420179bec
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 19028 bytes
SHA-256: 5f635714ffc1e06cc3adbe1f419b1afc1218117c26e9831e08745cd6b74bac39

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