Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de6d6e2c591b6d4…

MALICIOUS

PDF

32.9 KB Created: 2021-06-25 21:58:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1a44f6e945b1b9cb834de8d120a77a8f SHA-1: 2533b6ef929cfbe06a9b1415c23ecb0c104523ef SHA-256: 9de6d6e2c591b6d4c7505ab5692bf1641edaa173fdee8ef2e6efbdc580f4c46c
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files promising hacks or in-game currency for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links suggests a link farm or a distribution mechanism for further malicious content. The document's content and structure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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/hack-dinero-roblox-game-hack PDF link annotation
    • http://www.nguyentraiedu.vn/cms/public/upload/files/can-u-hack-roblox-with-lucky-patcher_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/pokemon-go-kanto-tour-free-version_GM1094591345.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-the-chill-turtle-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/how-to-get-free-bc-and-robux_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-pastbin-hack_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-login-free-download_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/admin-console-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/roblox-delitive-mod-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.nguyentraiedu.vn/cms/public/upload/files/change-roblox-username-free-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_off00002b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7D 22076 bytes
SHA-256: 7e2a6b281a3f08ddc0fb60725580071742be187bde7f8080ebec320a7a870c76
font_01_sfnt_off00005bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFA 18944 bytes
SHA-256: dce810bf8e8af285376b1106cb74af503e85d11560fbd7ae69123385897e6c94

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