Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c983f80e905cac8…

MALICIOUS

PDF

43.2 KB Created: 2021-05-19 03:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 58227465b44bce8419db77560f91cadc SHA-1: e537e44d7f1b48359e4bf747f53f1cea6c286135 SHA-256: 7c983f80e905cac871c8bd680c40a09bb803d6783236d3929f6defcbd8a08093
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spam tactic. One prominent URL, https://netcdn.xyz/app/431946152/roblox-arsenal-hack-script-pastebin-game-hack, suggests a lure related to game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links and a call-to-action button further supports a malicious intent, likely to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/roblox-arsenal-hack-script-pastebin-game-hack
    • http://altc.de/images/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://altc.de/images/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://altc.de/images/how-to-change-your-roblox-username-for-free_GM431946152.pdf
    • http://altc.de/images/are-robux-generators-safe_GM431946152.pdf
    • http://altc.de/images/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://altc.de/images/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://altc.de/images/coin-master-free-stuff_GM406889139.pdf
    • http://altc.de/images/www-coinmaster-com_GM406889139.pdf
    • http://altc.de/images/ways-to-get-free-robux_GM431946152.pdf
    • http://altc.de/images/master-free-spin_GM406889139.pdf
    • http://altc.de/images/roblox-sexually_GM431946152.pdf
    • http://altc.de/images/free-spins-coin-master-app_GM406889139.pdf
    • http://altc.de/images/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://altc.de/images/coin-master-apk-hack-3527_GM406889139.pdf
    • http://altc.de/images/minecraft-gun-mod-download-free_GM479516143.pdf
    • http://altc.de/images/roblox-hack-app_GM431946152.pdf
    • http://altc.de/images/free-mods-for-coin-master_GM406889139.pdf
    • http://altc.de/images/twitter-coin-master-free-spins_GM406889139.pdf
    • http://altc.de/images/free-gold-cards-coin-master_GM406889139.pdf
    • http://altc.de/images/free-spins-coin-master-app-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000471c.bin
67c992f7184238e22851f81692addaf2dabcf36377414919e7ced515a05d2a1c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x471C 26888 bytes
font_01_sfnt_off000084ff.bin
7de8619ef554dfe1f2192c4aca90399aa0815846f6a8f71df992d0e349aeb038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 18736 bytes

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