Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2cd34d2c06eb02…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 11:09:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8baf80e5778462babc156507b5cdbbea SHA-1: aca9a3e4081b51aa9172157a5b7b7352fb5c4765 SHA-256: 8d2cd34d2c06eb022a06abc9676f2c0e718f39be37bc4fd79ad25d45941c8629
100 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a visual call-to-action, indicating an attempt to trick the user into downloading a file. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL pointing to known malicious infrastructure, suggesting the downloaded content is likely malicious. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/cheats-for-the-tales-of-the-range In PDF document text
    • http://achauco.vn/public/upload/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-make-your-own-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/hacks-de-roblox-para-cualquier-los-juegos_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.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_off00003194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3194 22896 bytes
SHA-256: c078f4e55e0e2f6ec685d89eb1ff5b006f96bdcabbb40a48c4c76753a9f99b0c
font_01_sfnt_off000064db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 18972 bytes
SHA-256: 4c419c5bf33de31ec01671c79a0f6f8b22db972bf43547bdd40353ddcf48b6b1