Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28b9996ff45fa56…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 19:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5acd67f884023404c3c73fbfa290dde SHA-1: 2fe9d2c789fbc1c6e85187953b39bf28d7b043be SHA-256: d28b9996ff45fa569025d1e6f0bfe9fdc7a8153dbaf13cedcd5f33755e88f7bd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users with game hacking content, specifically targeting Roblox. The primary link, http://netcdn.tw/app/431946152/how-to-hack-roblox-health-game-hack, redirects to a malicious website. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of a game hack lure to drive users to external URLs. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to lead users to potentially harmful content or further malware downloads.

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/how-to-hack-roblox-health-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/links-hack-30-robux-adfly_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-to-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-your-roblox-account-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-quick-and-easy-no-hastle_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-speed-hack-and-noclip-on-roblox-jailbreak-patched_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-offers_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-animation-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-can-you-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-games-online-on-robloxcom_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/flame-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-spins_GM406889139.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_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 22580 bytes
SHA-256: b8284c96f24ee3e54f7f1dffa19a33ab58f073ae208e040cc17f918c5a7190e8
font_01_sfnt_off0000639a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639A 19088 bytes
SHA-256: 5ed4cddd8c55447d908924ca1d86c21c184fd524998bc02fab1092277c1d4b1b

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