Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad242d678d7db2c…

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 21:11:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f5e49f3dddc413ae0d8c374f3b1104ea SHA-1: 8c7da25f3e142e8f05203fd48903f1474261f76c SHA-256: 7ad242d678d7db2ceb60edbe44bf12484c0a2805e0b78f5e4c17207850ec8795
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of 'free Robux' and game hacks to entice users to click on a malicious link. The primary link, http://netcdn.tw/app/431946152/microsoft-free-robux-game-hack, is identified as a redirector to potentially harmful content. The document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/microsoft-free-robux-game-hack PDF link annotation
    • https://www.romedia.gr/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.romedia.gr/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://www.romedia.gr/images/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.romedia.gr/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.romedia.gr/images/how-to-get-followers-on-tiktok-for-free_GM835599320.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_off00002bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC4 22204 bytes
SHA-256: 97ebe714dba0cf9e170a5e584f08c736be7861dfc5ce228ba5919a7fa4b71c21
font_01_sfnt_off00005cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 18620 bytes
SHA-256: cf4a347bc644aa99f65748a18f16098da623aaefa5b93a722159d0d0b65b572f

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