Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a50f36dbb4515a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 09:12:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 52cc7310a2c78261ee92b9b417113307 SHA-1: 189595a040c3a69174fe889404ebe2a4a5333009 SHA-256: c4a50f36dbb4515a25d9432244fefb41aedb82c9d316c3acdabf7e5c42854902
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to deceive the user into interacting with it. It contains an embedded URL pointing to a resource that likely serves as a lure for free followers or game-related cheats. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/835599320/tiktok-free-follower-no-human-verification-game-hack
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-coin-master-stuff_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-robux-no-survey_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-coin-master-hacks_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/free-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-hack-online-generator_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-pet-food-hack_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/app-master_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/roblox-free-roblox_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/roblox-script-hacks_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/freerobuxhack-us-2021_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8e.bin
9196e1540b96787185effc56a203796012481bb02bad80382d2a556131f1d4c4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8E 26652 bytes
font_01_sfnt_off00008d69.bin
3af8cf720279d48f60b552a6fd15ed32a38aab0b8a5b35924c46d5720a232fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 18456 bytes

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