Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a5eb55dc4b058b…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 03:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 724ead2f6683ef5ce0315025f41ca447 SHA-1: cbf26ae8650baefd4afe851d79de63ce4dc444b9 SHA-256: 90a5eb55dc4b058ba4bc0a7edd8cb2bd027d3c1252a93d2d67f759b9d8eeba51
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to 'http://netcdn.tw/app/431946152/free-robux-no-verification-needed-game-hack' and a 'CLICK HERE TO ACCESS ROBUX GENERATOR' call-to-action, indicating a lure for a scam or potentially malicious download. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-verification-needed-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-download-minecraft-for-free-on-pc_GM479516143.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_off00002bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEC 22208 bytes
SHA-256: 2e02cd1566cfc4c8d155d310ff6a5ee0b8475d55aaa78c775dbb6f6a33804ded
font_01_sfnt_off00005d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4D 18960 bytes
SHA-256: f84c00a5f4de0f0f56267fefbe81f6503166d680d0fb608a7d78e26982bbbcac

Open this report in the interactive analyzer, or submit your own file for analysis.