Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa081b38d7dc662…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 12:35:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bdd219a21395a5e839f18d16633691af SHA-1: 1dadb2192bd17bfdfe4f8d8760a058f4bcf1e09a SHA-256: 3aa081b38d7dc66255c26d353a12f5b44780f31514aa10914a3a87af89ed6f12
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA lure, aiming to trick users into interacting with a malicious link. The embedded URL, https://netcdn.tw/app/431946152/get-your-game-popular-roblox-hack-game-hack, is likely the next stage in the attack, potentially leading to a payload download. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.tw/app/431946152/get-your-game-popular-roblox-hack-game-hack
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/blogspot-coin-master_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-hair-girl_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/promo-codes-for-free-robux_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-client-download_GM479516143.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robuxy-com-free-robux_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdf
    • https://pariwisata.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-free-play-now_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053de.bin
85c3d83e7c3db5ffab4812642db53940b67ccd3d93d9ae9eee6149678446b28b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53DE 26236 bytes
font_01_sfnt_off00008f39.bin
48d791ab70490364d79b078ec669bf75ee9b6c8747e53b6e07b3e136e3f9f5dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F39 19180 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.