Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fa6d3014442e80…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 10:56:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0f58508d86da970d527ca7341aa64e51 SHA-1: 0c9ef5fac169c1bd60c5eab3fc026923a83fa9bd SHA-256: 77fa6d3014442e80655b9e08e4ee69f679ea3cce3c2fbf550048291d6c96d0de
82 Risk Score

Malware Insights

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

The PDF document presents a fake CAPTCHA or verification prompt to trick users into clicking a link, likely to download a secondary payload. The embedded URLs, such as http://netcdn.tw/app/431946152/free-robux-codes-generator-no-verification-game-hack, are associated with lures for free in-game currency, indicating a social engineering tactic to compromise users.

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/431946152/free-robux-codes-generator-no-verification-game-hack PDF link annotation
    • http://simon-skov-fougt.dk/billeder/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-restaurant-tycoon-cheat-engine_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-how-to-hack-gears-online-rpg-using-cheats_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://simon-skov-fougt.dk/billeder/roblox-exploit-scripts_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_off000031de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DE 22468 bytes
SHA-256: a884b3dca14ddbbad5b1f3fa68e47c44af85f311eca791788dc770f73b68a270
font_01_sfnt_off000063ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 19248 bytes
SHA-256: ae2c0d8972e31d5fd2442df1a166e7aa138b9e721d28ea80a1459ad28ac3a5a0

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