Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9f73efd3b45e38…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 06:23:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c18f543f7aeee58ead5399fe7c21dc05 SHA-1: a0cdb51afaa9f268bf83949227efa8f66ff962ff SHA-256: 2c9f73efd3b45e38e5e0592a3da3c6e2dd02dcd0b1dbde7ee95259ce0cb31ecc
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource that is likely malicious, given the ML classifier's high confidence score and the nature of the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-hack-on-roblox-jailbreak-2021-game-hack
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-2021_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/claim-free-spins-coin-master_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/fast-robux-online_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-faction-defense-level-code_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-apk-android-free_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-tower-defense-2-hacked_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-no-download-2021_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/robux-xyz_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-hacked-client-18_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/hack-robar-cuentas-de-roblox-2021-pastebin-akaka_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-coin-master-game_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/win-free-robux_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-hack-mod_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000507f.bin
3114d0d494f52780dc0e7e6c802b0e76928ce80e634d6055d009b7df304eeb15		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507F 28848 bytes
font_01_sfnt_off00009085.bin
011d558b9dd21676eaf806947c1e8ec4a99b44ecaff8f5571364d172f863468e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9085 19036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.