Malicious PDF — malware analysis report

Static analysis result for SHA-256 9613e83b9bddd4fe…

MALICIOUS

PDF

33.1 KB Created: 2021-06-18 18:29:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6aaf2fc806b57bcc2016b6d3c3e35455 SHA-1: 55e33b23666a734373d016049194da12546a42cd SHA-256: 9613e83b9bddd4fefa3c3d616f7d1c1038271743aee228dfe88a21b796884b36
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, that direct users to websites offering game-related cheats and downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' lure further supports a malicious intent. The document's content and structure suggest it is designed to trick users into visiting these sites, likely to download malware or engage in other malicious activities.

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/games-for-free-like-roblox-game-hack PDF link annotation
    • http://hk-kan.org/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-for-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/robux-hack-generator-secret_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-pc_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/hack-de-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spin-app-iphone_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_off00002c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2C 21880 bytes
SHA-256: fd8cdd61e869ff3dc53ba258b7dbd194ea8004f3c4fb556486439d84bebd4372
font_01_sfnt_off00005c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 19016 bytes
SHA-256: e663eac2bf455051dc6ec46f97d7dae11a231942b016c6626892b2ac516be2c7

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