Malicious PDF — malware analysis report

Static analysis result for SHA-256 c348143f2f9ace5a…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 11:51:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: af7f810f0cb8df6123f75ef589c7dff3 SHA-1: 09bcfdb89a4a089e4bccd52a86a1c844cc075b09 SHA-256: c348143f2f9ace5a8df70153582b9ffb4f329454a73485cc3ffb43380206ec9c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious SEO link farm, designed to lure users with promises of 'Free Robux' and game hacks. It contains numerous embedded URLs pointing to other PDF documents, likely serving as a distribution mechanism for further malicious content or phishing attempts. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document.

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.co/app/431946152/free-robux-page-game-hack
    • http://lib.smklabor.sch.id/repository/who-to-get-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/get-free-robux-no-verification_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://lib.smklabor.sch.id/repository/how-to-hack-step-by-step-password-pictures-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/comandos-de-hacker-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/is-there-a-free-coding-platform-for-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/roblox-cheat-engine-tablre-and-bypass_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-t-hack-any-roblox-game-with-scripts_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/roblox-check-cashed-v7-hacks_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/cheat-engine-roblox-jump_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-roblox-account-pasword-and-user_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/hoew-to-fly-in-roblox-free_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-spin-link-of-coin-master_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-roblox-ad-design_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/growbux-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/roblox-adopt-me-hack-deutsch_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003548.bin
ea8f6e140adbcf23604cc7b52077cc5310d74dbb9913fbdec9fbd53dbb6658cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3548 22548 bytes
font_01_sfnt_off00006761.bin
b10b72572574bc46e19b2cbc8d7c516187f05faff383eaadfc3714c3980f0c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6761 18868 bytes

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