Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91d2c0e0cf6edf1…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 08:10:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba9efa3bc08cdccb9571b429b7be9beb SHA-1: 0893ea05ce775261eb45b9bc08d0f10a7652e971 SHA-256: e91d2c0e0cf6edf1836612c2dda1ded1787e807ffd928b900f5ab53f1ccc3c30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, designed to trick the user into interacting with a link. The embedded URL, http://netcdn.co/app/431946152/roblox-walk-through-walls-cheat-engine-jailbreak-game-hack, is likely intended to lead to the download of a malicious payload. The ML classifier also flagged this PDF with high confidence.

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/roblox-walk-through-walls-cheat-engine-jailbreak-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/how-to-become-hypebeast-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-jailbreak-best-teleport-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-without-verification-2021-april_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/pc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-ben-10-cheat-codes_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-free-obc-codes_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/pubg-uc-rate-in-india_GM1330123889.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_off00003131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3131 21852 bytes
SHA-256: 336ec72a32991f2dc20a17b07e9942cf34f94468b96654c46eb6ef1cba2b21ba
font_01_sfnt_off00006155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 19552 bytes
SHA-256: 82de1286f86a22f1fd8d63cdf58b1a76e08c13c218ec03d14f1928b6adbba142

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