Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24a73e0a29f641c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 01:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14ac8df924eea3383a19017eeb23f48d SHA-1: 19af690f7dfa075abff4f0082527316be9dfc1d1 SHA-256: b24a73e0a29f641cf17a25465c3b928e744fe0057c17ab82eecf60eafc5eef75
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/add-robux-game-hack
    • http://astdubai.co/userfiles/files/boku-no-roblox-all-legendary-quirks-hack_GM431946152.pdf
    • http://astdubai.co/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://astdubai.co/userfiles/files/rich-free-roblox-accounts_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-hack-pc-free_GM406889139.pdf
    • http://astdubai.co/userfiles/files/free-robux-codes-2021-on-ipad_GM431946152.pdf
    • http://astdubai.co/userfiles/files/tiktok-free-views-trial_GM835599320.pdf
    • http://astdubai.co/userfiles/files/roblox-rape-hack_GM431946152.pdf
    • http://astdubai.co/userfiles/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://astdubai.co/userfiles/files/coin-master-heaven-free-daily-spins_GM406889139.pdf
    • http://astdubai.co/userfiles/files/how-to-get-robux-for-free-no-generator_GM431946152.pdf
    • http://astdubai.co/userfiles/files/coin-master-hack-download_GM406889139.pdf
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdf
    • http://astdubai.co/userfiles/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • http://astdubai.co/userfiles/files/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://astdubai.co/userfiles/files/best-tricks-co-robux_GM431946152.pdf
    • http://astdubai.co/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://astdubai.co/userfiles/files/free-robux-generator-2021-ad_GM431946152.pdf
    • http://astdubai.co/userfiles/files/roblox-free-printable-coloring-pages_GM431946152.pdf
    • http://astdubai.co/userfiles/files/roblox-hacks-2021_GM431946152.pdf
    • http://astdubai.co/userfiles/files/games-that-give-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff1.bin
9ef76a4048b90120479ff5e3c0026fa0895ed0dd7f1387f8eb2c8d1aa10e1910
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 23060 bytes
font_01_sfnt_off000063b4.bin
512d4d7d2d522c0c0c377fbb1505fec489c5c43cce88f3b7b3f6df74f7c930d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B4 18728 bytes