Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d0539294671435…

MALICIOUS

PDF

38.4 KB Created: 2021-05-20 19:27:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d09934801127fcbed9d710a12f6013b7 SHA-1: 12193e0fb99913112c148347d872dc49f06b6e4a SHA-256: e1d05392946714357b30f290e2b68b3f92886655314b25627cbe5b1db4b0d57d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to lure the user into downloading a file, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It also contains multiple URLs pointing to potentially malicious downloads related to game hacks and free spins. The presence of these lures and suspicious URLs suggests an attempt to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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.xyz/app/431946152/roblox-studio-free-download-game-hack
    • https://nexsoftech.com/upload/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-free-robux-com_GM431946152.pdf
    • https://nexsoftech.com/upload/userfiles/files/coin-master-hack-apk_GM406889139.pdf
    • https://nexsoftech.com/upload/userfiles/files/free-spin-in-coin-master_GM406889139.pdf
    • https://nexsoftech.com/upload/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdf
    • http://wolfzscripts
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000315b.bin
13f2b54255482f670eb70b2c4d5e5fe18b03c57ec06b7273de0e59dbd1d79201		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x315B 24116 bytes
font_01_sfnt_off0000686e.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 2832 bytes
font_02_sfnt_off0000721f.bin
285731f73243192995ef55c7bff5b12d0277a9b461a1d4b1bbd56785699d0c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 19048 bytes

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