Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1774bc9a0fc43a…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 21:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 479fdb8c6bf9a62fbc782f31b9591694 SHA-1: a4b80276524ee5508e545669fef14f482035ac21 SHA-256: 8c1774bc9a0fc43ac58dd07cfadd1172d8107ddfa1462d9b6725f48a798ce572
142 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into clicking embedded links. The document body and heuristics indicate a focus on free game currency and items, such as Robux, to entice victims. The numerous external links suggest an attempt to direct users to potentially malicious websites or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-no-verification-needed-game-hack
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-free-robux-bots-are-back_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-free-apk_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-de-mad-city-rodny-roblox_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-groups-on-roblox_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-stickmasterluke_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-roblox-printables_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-apk_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/games-like-coin-master-for-free_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/earngg-free-robux_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/fre-click-tp-roblox-script_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-20217_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/daily-spins-coin-master_GM406889139.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hackear-roblox-cr7_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/www-robux-com-free_GM431946152.pdf
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000356a.bin
0a9f31b0934d29be9fb6ea224e6c06f32e3c36f84bb2c21967a73eb3e520124d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x356A 22392 bytes
font_01_sfnt_off0000675b.bin
b08a7874b1039348e697072185540dcc8349f662e13696354c6ec42bca015dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675B 19248 bytes

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