Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fcf0fae5bf872c…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 04:05:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 01910eb9af4c8d9c778d6fc08f5e09df SHA-1: a99cfd13e25baad3f25de8c2c4cc15fa89dfd528 SHA-256: e5fcf0fae5bf872c532897cd4c20f3315cc3bb06038bfa3e76bb795e69a5cbf0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. This pattern is commonly used to trick users into visiting malicious websites that may host further malware or phishing content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/real-hack-robux-game-hack PDF link annotation
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-android-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-how-to_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/can-you-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-hack-add_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/roblox-free-game-play-no-download_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-get-free-robux-dylan_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/hack-roblox-with-lucky-patcher_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/how-to-make-an-audio-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://www.lincolnec.edu.np/userfiles/files/hacked-roblox-face_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_off00003151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3151 21660 bytes
SHA-256: c8d68c931b1b3306682ff5f2368ee6cdc741ea3a7edfdaa91d15dab4ae6f5882
font_01_sfnt_off000060ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EA 18796 bytes
SHA-256: 4778ab86f8c1c5eae5c755859a3d7a04f53c86802150076c0b4f90a2de0861fc

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