Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91c9f2755263475…

MALICIOUS

PDF

37.6 KB Created: 2021-06-26 06:46:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 897fde581b27629b3f81534806026fee SHA-1: 7c1862df02ce7abc654c5578fb7384c77670967e SHA-256: c91c9f2755263475df9f0baaabeecb0ba90d002929fa215b54f206dc266c7250
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body and extracted URLs suggest a lure related to game cheats or hacks, likely to entice users to click the malicious link. While no scripts were explicitly extracted, the PDF structure and malicious link strongly suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-noclip-in-roblox-cheat-engine-6.4-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-someone-hack-my-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/april-1st-stickmasterluke-hack-face-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-make-a-gaming-website-for-free-like-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-change-your-name-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/como-hackear-roblox-2021-en-android_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/lazyblox-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-game-hacking_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-tool-cheat-hacker_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-2021-working-august-2021_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_off00003bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BED 21972 bytes
SHA-256: 44e5d6fb5f4d884ba404ff9de56bfcdecb3ca94a7a0fe6fa75ed21f6a5890878
font_01_sfnt_off00006c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C75 19512 bytes
SHA-256: 853515474751356da8cba7d54c2059c9d3e7726d9e7af9b033a6efd4e71ab2a0

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