Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbc87eeaa23d66a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 04:35:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a2117578e62c1b330c5b1d06ea5cd895 SHA-1: 99ce7bd247871028a9a2248d9c34f9bc17e078ce SHA-256: ffbc87eeaa23d66a4210e1b2d21b0a7ac7c5d8d2de895a230d854ce7314b5048
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are presented as free game hacks and cheats for popular games like Minecraft and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users seeking illicit game modifications. The ML classifier also flagged this PDF as malicious with high confidence.

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/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack
    • https://vireco.store/ckfinder/userfiles/files/fly-hack-for-roblox-jailbreak-2021-script_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/how-to-get-2021-robux-for-free_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/how-to-get-free-robux-without-purchising-games_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdf
    • https://vireco.store/ckfinder/userfiles/files/roblox-medieval-hood-of-mystery-free-download_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/games-for-robux_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/coin-master-hack-progamers_GM406889139.pdf
    • https://vireco.store/ckfinder/userfiles/files/roblox-breaking-point-aimbot-hack_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/is-minecraft-free_GM479516143.pdf
    • https://vireco.store/ckfinder/userfiles/files/how-to-walk-through-walls-in-roblox-jailbreak-hack_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/coin-master-hack-apk-ios-download_GM406889139.pdf
    • https://vireco.store/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://vireco.store/ckfinder/userfiles/files/apk-roblox-hack-2021_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://vireco.store/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdf
    • https://vireco.store/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdf
    • https://vireco.store/ckfinder/userfiles/files/coin-master-free-spins-gratis_GM406889139.pdf
    • https://vireco.store/ckfinder/userfiles/files/free-roblox-ban_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000329d.bin
e9e1d14ce0574d1acf46ce561c9cc95f0373d577d252d80c25eef544ccb3b2f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x329D 22212 bytes
font_01_sfnt_off000063aa.bin
f716e881059f29ffa9bbe1d090f6d126727f740b51ca9620c60dab13ccdfe3d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 18812 bytes