Malicious PDF — malware analysis report

Static analysis result for SHA-256 63041f6d0dbaa2cc…

MALICIOUS

PDF

33.9 KB Created: 2021-06-30 10:13:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a4058904e891d34fb43a7f47fc46341c SHA-1: 43662a12541cc705e4afd7e8dd5053e507a73f05 SHA-256: 63041f6d0dbaa2cc25b22cccbc49ec4b3a3cdc713a551af0f14b17a652df3da1
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA lure to deceive users into clicking a malicious link. This link, http://netcdn.co/app/431946152/free-roblox-lightroom-cinema-4d-game-hack, likely leads to the download of a second-stage payload. The document's content and embedded URLs strongly suggest a social engineering tactic aimed at tricking users into executing further malicious actions.

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.co/app/431946152/free-roblox-lightroom-cinema-4d-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-tshirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/discord-roblox-hack-sellers_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-mining-sim-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-free-t-shirt-nike_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/script-hack-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-egg-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-restaurant-tycoon-hack-lua-c_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/omg-free-robux-hack-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-combo-list_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/get-free-robux-info_GM431946152.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
font_00_sfnt_off00003073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3073 20940 bytes
SHA-256: b4088c7bd2d8e44450232e5b670a911121bed15fae932e3cc02bc50b786497a8
font_01_sfnt_off00005df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF0 19536 bytes
SHA-256: 55094fdc880eda91be561eb09397975cc0a8749fd7677e72e0c421bddbd30bed

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