Malicious PDF — malware analysis report

Static analysis result for SHA-256 628132c8e7cef06f…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 10:37:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 829a458fdf8039faa97add11fb620573 SHA-1: 7b191f266063f4066d8af6ea238084c5e7938640 SHA-256: 628132c8e7cef06f6ff4f3d98567d6756544e33787aa24ed188cfc0920426fd4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are part of a link farm designed to appear as legitimate resources for game cheats and free currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to potentially malicious content hosted on the provided URLs.

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/406889139/coin-master-free-spins-haktuts-game-hack
    • https://opac.umrah.ac.id/repository/how-to-hack-a-roblox-game-without-cheat-engine_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-skins-free-download-fnaf_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-crashes-when-i-open-cheat-engine_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-jailbreak-hacker-transparent_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-robux-giveaway-every-hour_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/can-someone-hack-you-if-you-report-on-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/rbx-roblox-free_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-shenanigans-mod-cheat-codes_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/cheat-to-make-my-damage-higher-on-da-hood-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/free-links-to-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/how-to-hack-a-profile-on-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/armadyne-industries-free-roblox_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/real-working-coin-master-hack_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/static-moonactive-net-link_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/earn-free-spins-in-coin-master_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/pastebin-com-free-robux_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/roblox-hack-apk_GM431946152.pdf
    • https://opac.umrah.ac.id/repository/coin-master-hack-account_GM406889139.pdf
    • https://opac.umrah.ac.id/repository/how-to-get-anything-on-roblox-for-free-easy-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034a7.bin
539487a0413c26052cfc6a27b9074f6c0ceffbb00d6ab9e4c2d44a4464090aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x34A7 22908 bytes
font_01_sfnt_off000067f4.bin
f4f9ad1f9ed7968e2344e2d1f3b165ae8c607e70d6a002aee90d609eb2aca606
pdf-font-stream PDF embedded font (sfnt) at offset 0x67F4 18484 bytes