Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9e124cb14c988c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 02:50:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f617f6d9c6aa3c87fb35983a8fce8448 SHA-1: 1318b068419c97b78b1b4ff1e2368f08cec53a45 SHA-256: 3d9e124cb14c988cd1fc28f3fb28110dfa7a60684ec4b9d9f8f6e9cf6186db68
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "Robux Generator" which redirects to a suspicious URL, indicating a likely phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. Although no scripts were extracted, the embedded URLs and the nature of the lure suggest the document is designed to trick users into downloading a payload or visiting a malicious site.

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/robux-generator-no-verification-2021-game-hack PDF link annotation
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-no-quiz_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-free-catalog-items-in-roblox-no-copy_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-model-butterflies-roblox_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/plugin-free-robux-download-pc_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/best-free-exploit-roblox-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/make-robux_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-gift-cards-roblox-2021_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/tiktok-free-pc-download_GM835599320.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-admin-hack-gui_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_off00002f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F36 21932 bytes
SHA-256: 1ab9ed900241acf9fa3b50559764cc9f1c7ad4479d7e4381ea0febc712eeaf8f
font_01_sfnt_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 19312 bytes
SHA-256: e87996554a28625538ac949b95fe0d935b31d0f90cb91e6b9a3bc1e079d88d16

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