Malicious PDF — malware analysis report

Static analysis result for SHA-256 46eb7bf3652d5560…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 07:56:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2572e4cc625c806ab120d484b6fb255c SHA-1: a3b6a84507eb079778300735bcaec11cddc7e526 SHA-256: 46eb7bf3652d556017d54586d6d1ca3f67fe8c8f307465ae80a7879ba52401f4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links for game hacks and cheats. The 'SE_CLICKFIX' heuristic indicates the document likely instructs users to execute commands, a common tactic to bypass security measures. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to lead users to malicious downloads or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.online/app/479516143/minecraft-survival-hacks-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-client_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-apk_GM406889139.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_off000052d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D5 25008 bytes
SHA-256: d2dc7f30bb243a3a7fd3cf317131d9d80759055a42c143ac5f68991941bca62f
font_01_sfnt_off00008bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF7 18064 bytes
SHA-256: b356890df1a237005749e25630c39dae3f7a9062fb148157208e134e16779e55

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