Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4fbf1a4a421e1e…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 14:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d9facc6e3e748b8bcc01b9a3b55b4346 SHA-1: 8b5adaed43a526474135fde1916cc76c5823e4f8 SHA-256: 2b4fbf1a4a421e1e74c5a33176e2c2c95ef6a70d3eb3550d3b22a44d148c920b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text referencing free game currency and hacks, specifically for Robux and Minecraft. The primary URL, http://netcdn.co/app/431946152/how-do-you-get-free-robux-on-survey-game-hack, is flagged as a redirector and associated with a game hack lure. This strongly suggests a social engineering tactic to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.co/app/431946152/how-do-you-get-free-robux-on-survey-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/blueberry-hack-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/life-in-paradise-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-somebodys-roblox-account_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/www-roblox-party-com-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/boku-no-roblox-hack_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_off00002e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E63 22300 bytes
SHA-256: 8b93dd12c888cf22eda800d2ecc71e19dec46bb2127ca8450b6831b7c5b35e4c
font_01_sfnt_off00006029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6029 19608 bytes
SHA-256: a784b1f06c54345c6572bb23de148294619e1dd55a1ad88a6a116aab4426aad2

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