Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e03b869e9c8fbb…

MALICIOUS

PDF

48.0 KB Created: 2021-06-07 09:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b54185b9850d3922a373b0eee314c3f2 SHA-1: a5b7c1988642768c5db5f040a9a88afed33c55ac SHA-256: e6e03b869e9c8fbb2973f88276b2f943667c0167cd8e3693d324a0c354c99733
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into downloading a file from a malicious URL. The embedded URL `https://netcdn.tw/app/431946152/roblox-virus-free-download-game-hack` is a primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to facilitate a download, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-virus-free-download-game-hack
    • http://msfs-eastafrica.com/images/how-to-block-someone-on-coin-master_GM406889139.pdf
    • http://msfs-eastafrica.com/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://msfs-eastafrica.com/images/coin-master-ids-for-free-spins_GM406889139.pdf
    • http://msfs-eastafrica.com/images/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://msfs-eastafrica.com/images/free-headless-head-roblox_GM431946152.pdf
    • http://msfs-eastafrica.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://msfs-eastafrica.com/images/minecraft-hack-client-18-9_GM479516143.pdf
    • http://msfs-eastafrica.com/images/minecraft-hack-2021_GM479516143.pdf
    • http://msfs-eastafrica.com/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://msfs-eastafrica.com/images/coinmaster-spin-ml_GM406889139.pdf
    • http://msfs-eastafrica.com/images/are-roblox-hack-clients-real_GM431946152.pdf
    • http://msfs-eastafrica.com/images/roblox-troll-outfits-free_GM431946152.pdf
    • http://msfs-eastafrica.com/images/minecraft-pe-hack-client_GM479516143.pdf
    • http://msfs-eastafrica.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://msfs-eastafrica.com/images/hacked-client-for-minecraft-bedrock_GM479516143.pdf
    • http://msfs-eastafrica.com/images/how-many-levels-are-there-in-coin-master_GM406889139.pdf
    • http://msfs-eastafrica.com/images/coin-master-free-link_GM406889139.pdf
    • http://msfs-eastafrica.com/images/how-can-u-get-free-robux_GM431946152.pdf
    • http://msfs-eastafrica.com/images/no-scam-free-robux_GM431946152.pdf
    • http://msfs-eastafrica.com/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005186.bin
2c9b2449ab40120086b2633e18b215600cb366a11e7d0c8d944d78bb472e284a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5186 25508 bytes
font_01_sfnt_off00008bd4.bin
0eac32074ede5a7137204e636ea7e2fd9426c3d3d5e7ff020b1898996628efce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD4 3012 bytes
font_02_sfnt_off0000964b.bin
88ce6cef393aa203f602eee8ebf315154974f4c0ccb63aa2d2026a567f01fa68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964B 19076 bytes

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