Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35ee19e741c3b41…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 09:29:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4a2d77f018a0c3daf3ae919a50e28b9 SHA-1: 8517a8965412555eb5c3c98984f93f4c4e0d12de SHA-256: e35ee19e741c3b41bb08831b7573b67fc74295b4a16dc2d3962e1f3273b142cf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to 'free Robux' and game hacks, indicating a lure for a scam or potentially malicious download. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests this intent. While no scripts were directly extracted, the nature of the lures and embedded URLs point towards a phishing or social engineering attack.

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-robux-no-downloading-games-game-hack PDF link annotation
    • http://new-era.com.tw/image/data/files/roblox-free-alt-accounts_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-sound-effects_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-hack-trolling-download_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-catalg-on-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-how-to-change-your-name-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/earn-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/codes-for-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-clothes-codes-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/when-does-john-doe-hack-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/unjailbreak-free-download-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_off00002f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C 22024 bytes
SHA-256: d6a9acbc04979c63ff466e555f5d986719b82dd862eb4f36672e9fa37833c285
font_01_sfnt_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 19488 bytes
SHA-256: 9874e04511d96cc08c8887cc9b63b328d7fa21f9db786f70fabed201f0f1d127

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