Malicious PDF — malware analysis report

Static analysis result for SHA-256 2397db7d83964486…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 08:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e2d2a0c44e5229c0d418a7756ab7ddce SHA-1: 9bac0b9e1695115dc40cf1f687ef9cc075f2b079 SHA-256: 2397db7d839644868d17aac54b440597d1b0e1b85fa8d5504a4c706c48659fe3
82 Risk Score

Malware Insights

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

The sample is a PDF document that displays a fake CAPTCHA to lure the user into clicking a link. The primary malicious URL, http://netcdn.tw/app/479516143/free-minecraft-java-account-game-hack, is embedded in the document and was flagged by heuristics. This suggests the document is designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/free-minecraft-java-account-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-cheat-codes-for-iphone_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/put-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-nijna-legends-hacks_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-use-a-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-headphones-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-day-z-2-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/inf-currency-in-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-human-verification-or-survey-2021-easy_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-so-sick_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/hack-lecteur-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-login-free-online_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-welcome-to-bloxburg-money-hack-luc_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3173 22464 bytes
SHA-256: c9f9d537e5dfaeb92e6ec81d7d1dec5918f4c76d1ecfd2048c0384bfcf0afdad
font_01_sfnt_off0000638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 18420 bytes
SHA-256: 1c3f9368ae9341fd87c323918a5db0c95def7528b1578e993c766083598f8ad6

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