Malicious PDF — malware analysis report

Static analysis result for SHA-256 e933882d3bb53b2c…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 17:40:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c38afa8622226ed83011d6d07fba6436 SHA-1: c5e73fc5d0c5171c4638ff6b942ebb181a63afb2 SHA-256: e933882d3bb53b2c95854d1642de2c0063de0ecea57ef2789e5136b927eface3
82 Risk Score

Malware Insights

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

The PDF document was flagged by an ML classifier and contains a fake CAPTCHA lure, indicating a social engineering attempt to trick the user. It also contains multiple embedded URLs, one of which, https://netcdn.xyz/app/431946152/robloxfun-com-robux-game-hack, is likely the primary download destination for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robloxfun-com-robux-game-hack
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-minecraft-servers-to-join_GM479516143.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-phantom-forces-hack_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/minecraft-hacks-wurst_GM479516143.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/minecraft-creative-mode-free_GM479516143.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-without-root_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/earn-robux_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-hack-download-pc_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-coin-master-generator_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/coin-master-spins_GM406889139.pdf
    • http://server1.elearningmansatuokit.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a1.bin
b82fcc7bd4e23ecc097d18c5d1ac38e93b54c5b9736ffdb13832eb2e7f0f451c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A1 28368 bytes
font_01_sfnt_off000089a8.bin
fb2878a91dd4ae4631059b536a064fe34c72006964cde351e60079f6cb65e1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A8 18184 bytes

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