Malicious PDF — malware analysis report

Static analysis result for SHA-256 5524afd38ed1b505…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 23:43:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 509e8823121ecc013149e145c7854cc3 SHA-1: fb31ea2bb44b46109fb6909c9e15ae85e77e56a8 SHA-256: 5524afd38ed1b5058af66c412c29296da8e2cb6ee0231a7f3f52bb2cdb87a217
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains numerous embedded URLs, including http://netcdn.tw/app/431946152/free-robux-redeem-codes-game-hack, which likely lead to phishing pages or malware downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to deceive users into clicking malicious links.

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-redeem-codes-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/hacks-de-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-mod-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-roblox-items-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/get-free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/synapse-x-download-free-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-fly-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-cheat-net_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-studio-online-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-forest-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-robux-for-free-legal-website_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-paddwords_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/aimbot-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021-easy-no-inspect_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/learn-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/policesym-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-make-your-t-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-generator-download-2021_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_off0000302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 22420 bytes
SHA-256: 5c59c8486a58cdb9bbf2f020c09a8eb30ba90d29f261e577a2a501d6db84800e
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 19152 bytes
SHA-256: 2beb9c583ef49ea143b974913017cf2f00d835df8237c6c52447211218059ebd

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