Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb846143de1428d3…

MALICIOUS

PDF

43.4 KB Created: 2021-06-14 01:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 057e3852f86b866279664487cf4ef24f SHA-1: 6a49c47a434321f85080802b1beefe4f840038fd SHA-256: cb846143de1428d360b9498ef4e4a6dfa204497e5ece563754b183374323fb9d
82 Risk Score

Malware Insights

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

The document presents itself as a "Roblox Hack" and employs a fake CAPTCHA to trick users into interacting with it. It contains numerous embedded URLs, one of which, http://netcdn.co/app/431946152/roblox-hack-no-download-no-survey-2021-game-hack, is likely the primary download destination for a malicious payload. The presence of a fake CAPTCHA and download lure strongly suggests a phishing or social engineering attack aimed at tricking users into executing further malicious steps.

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 http://netcdn.co/app/431946152/roblox-hack-no-download-no-survey-2021-game-hack
    • http://opac.salatigakota.go.id/slims7//repository/roblox-robux-codes-2021_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-eoblox-fiddler_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/roblox-free-bundles_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spins-link-today_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-no-verification-or-grantor-trust_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-hacker-us_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-robux-that-actually-works_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/hacks-for-roblox-jailbreak_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7//repository/hack-coin-master-free_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7/repository/rxgate-cf-free-robux-generator_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7/repository/roblox-free-robux-survey_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/free-minecraft-account_GM479516143.pdf
    • http://opac.salatigakota.go.id/slims7/repository/free-tiktok-video_GM835599320.pdf
    • http://opac.salatigakota.go.id/slims7//repository/roblox-hack-me_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/roblox-script-hack_GM431946152.pdf
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-apk-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b27.bin
3e89d8510c3f56ef18f925f60263c23bf12413fa4b5531604cd99774ec157bb5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B27 24704 bytes
font_01_sfnt_off000082a0.bin
6e1662f61dab6f80ead1fb6cdac7f524433872294c6f85746f731d97f359b6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A0 19712 bytes

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