Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a2132df8a7f160…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 11:24:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0b6a29c1fb9197a95dd545df6f6e8bbb SHA-1: dfa07a7f2c8e660117ca8e951576c2dda0e06184 SHA-256: 50a2132df8a7f1605f76ee92755b8202cea5555f6757f60513710b1f060900e4
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with a malicious link. The embedded URL, https://netcdn.online/app/431946152/best-free-robux-sites-game-hack, likely leads to the download of a second-stage payload. The document body content and numerous embedded URLs related to game cheats and free items further support this phishing and potential malware delivery attempt.

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/431946152/best-free-robux-sites-game-hack
    • http://lib.stimykpn.ac.id/repository/coin-master-coins-hack_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/coin-master-cheat-codes_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdf
    • http://lib.stimykpn.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-robux-net_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-clothes-code_GM1094591345.pdf
    • http://lib.stimykpn.ac.id/repository/minecraft-free-education_GM479516143.pdf
    • http://lib.stimykpn.ac.id//repository/free-robux-today_GM431946152.pdf
    • http://lib.stimykpn.ac.id//repository/minecraft-java-free-download_GM479516143.pdf
    • http://lib.stimykpn.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/strucid-aimbot_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://lib.stimykpn.ac.id//repository/coin-master-spins_GM406889139.pdf
    • http://lib.stimykpn.ac.id/repository/avatar-de-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/what-are-points-for-in-roblox_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-robux-link_GM431946152.pdf
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004df3.bin
23f53cf9305a52b92698daab19cfe5005af54253afccd98305e8fce62e6da1a8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF3 27544 bytes
font_01_sfnt_off00008d4b.bin
68f5330c443815a71c203001c9650c5b168215c0ad869b16e6a359c0f2b36386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 18236 bytes

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