Malicious PDF — malware analysis report

Static analysis result for SHA-256 3efb8065fe46b882…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 05:40:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c0909e780d497f34242277e7e91b8e90 SHA-1: c0d494270a299be3b1a9d3732259ab99958f75d5 SHA-256: 3efb8065fe46b882fab11ff1ccf843d4cc5044511310656a8b6237caf164d521
142 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA and explicitly requests recovery secrets, indicating a phishing attempt. The embedded URL, https://netcdn.online/app/406889139/coin-master-daily-free-spins-haktuts-game-hack, likely leads to a malicious payload or further phishing content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-daily-free-spins-haktuts-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/can-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-stuff-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-easy-and-no-ganerators_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-tiktok-engagement_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F6 25420 bytes
SHA-256: 1acd25780b85562592d170ce4173836022ab2ee7281fe08ea727998cc6c07d01
font_01_sfnt_off00008d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D67 18620 bytes
SHA-256: fb152ca50fe850c571f6e3814e594dc8907a27263d0d36506419ff2694520b64

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