Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ac43e4c65c8cfc…

MALICIOUS

PDF

43.0 KB Created: 2021-05-19 09:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dfb89ad13df3aed461529d4d50b2a27c SHA-1: 0b8c0ac923f93310c88179a4c07ca6839e23c1cb SHA-256: 24ac43e4c65c8cfce4491b2254f65b37a2c6ffe0d0582efc8ca1123854ec5427
142 Risk Score

Malware Insights

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

The PDF document contains numerous external links disguised as "hacks" and "free items" for popular games, presented with a fake CAPTCHA lure. The primary URL, https://netcdn.xyz/app/406889139/real-working-coin-master-hack-game-hack, and the extensive list of related PDF links suggest a coordinated effort to drive traffic to potentially malicious sites or downloaders. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/real-working-coin-master-hack-game-hack
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coinmaster-free-spins-link_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-mod-apk-latest-version-free-download_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hack-coin-master-app_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/minecraft-115-2-hacks_GM479516143.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-apk_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-games-com-free_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/code-free-robux_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-fb_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d16.bin
091b56fafcf531f8e7be51379530fea4829fb46a83f7f13aa0eff501b39d5bb5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D16 24756 bytes
font_01_sfnt_off000085bc.bin
b738e75be18aea5c9f27761cbb1ef73bc9b28f3240c5da18f5fa5a3f41f529c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85BC 18276 bytes

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