Malicious PDF — malware analysis report

Static analysis result for SHA-256 2460fd184532a8a5…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 14:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1cc3e7c5e73873f1b9baf97ad19cae15 SHA-1: 09df29e91661018ce42c126c1950b15f66341df0 SHA-256: 2460fd184532a8a560ad8ae7d474a82071f6fa78b2b0c114ccf6252405be3f24
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to specific content. The presence of a "download button" lure and the ML classifier's high confidence score indicate malicious intent. The document body, though partially garbled, references "Master Coin Hack" and includes a URL pointing to a "game-hack", reinforcing the lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/master-coin-hack-game-hack
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/can-you-earn-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-app-free-download_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-win-free-robux_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-quiz_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/master-coin-free-link_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-coin-master-no-verification_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-girl_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/hack-para-coin-master-sin-verification_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/get-coin-master-cards-free_GM406889139.pdf
    • http://www.smkrekayasa-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-apk_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000498f.bin
063926814e0aed68fe9ff648d916fbf386478e7671891034de5b0e371542812c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498F 25120 bytes
font_01_sfnt_off0000839e.bin
abdfd9ce9c51c2315b4184c3f66e8c354c7c04da0bed37d59ef3bf7a35c4f7e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x839E 17716 bytes