Malicious PDF — malware analysis report

Static analysis result for SHA-256 2831fa2b82ff6ce2…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 14:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 80bc10d74c87ca374534b0987b589432 SHA-1: b1bf81bf2acfb7a25db67029f1dadc807106f39c SHA-256: 2831fa2b82ff6ce2d74d60143c0b9ac11752c496c0a84343802e7264ff9f3447
102 Risk Score

Malware Insights

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

The PDF document contains a high number of external links, many of which are structured to appear as search engine optimized content, suggesting a link farm or SEO poisoning attack. The document body and extracted URLs indicate a lure related to game hacks (Roblox, Minecraft) and in-game currency, likely to trick users into downloading malware or visiting malicious sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-hack-roblox-in-1-min-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-robux-hack-2021-lenovo_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacks-para-roblox-2021-booga-booga_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-do-you-get-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-com-free-avatar_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-2021-free-robux-pc_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-2021-free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3068 22104 bytes
SHA-256: 915d04a226b86ab43b8df712dd65aa132d978e5bfdbb9e447755223a7076ae5a
font_01_sfnt_off000060fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 19244 bytes
SHA-256: b46bedf09eadfebaaa486739a9f04564e048272e05d76df4ed8372fb3faa6687

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