Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4e866c27a4e10b…

MALICIOUS

PDF

47.5 KB Created: 2021-05-12 10:00:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9547eecbf563ed216c6615654b0a772a SHA-1: a53a4ad388a78f82b516441b2c8dd018825c0b80 SHA-256: ad4e866c27a4e10ba85d9f548ef898e83ab2ea27793383061096c7eb610e9267
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs and a heuristic firing for a PDF link farm, indicating a likely attempt to direct users to external content. The document body, though partially garbled, contains references to 'Coin Master Online Hack' and a URL that suggests a lure for game-related cheats or exploits. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-online-hack-game-hack
    • http://centralbasinroofing.com/images/how-to-sue-roblox_GM431946152.pdf
    • http://centralbasinroofing.com/images/coinmaster-links_GM406889139.pdf
    • http://centralbasinroofing.com/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://centralbasinroofing.com/images/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://centralbasinroofing.com/images/free-links-for-coin-master_GM406889139.pdf
    • http://centralbasinroofing.com/images/free-spins-for-coin-master-app_GM406889139.pdf
    • http://centralbasinroofing.com/images/games-that-give-free-robux_GM431946152.pdf
    • http://centralbasinroofing.com/images/hacks-for-coin-master-game_GM406889139.pdf
    • http://centralbasinroofing.com/images/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://centralbasinroofing.com/images/how-to-buy-robux-for-free_GM431946152.pdf
    • http://centralbasinroofing.com/images/roblox-free-bundles_GM431946152.pdf
    • http://centralbasinroofing.com/images/how-do-you-get-roblox-for-free_GM431946152.pdf
    • http://centralbasinroofing.com/images/coin-master-free-attack-hack_GM406889139.pdf
    • http://centralbasinroofing.com/images/free-robux-script_GM431946152.pdf
    • http://centralbasinroofing.com/images/hack-the-coin-master_GM406889139.pdf
    • http://centralbasinroofing.com/images/coin-master-gold-cards-free-link_GM406889139.pdf
    • http://centralbasinroofing.com/images/coin-master-free-spins-link_GM406889139.pdf
    • http://centralbasinroofing.com/images/minecraft-115-2-hacks_GM479516143.pdf
    • http://centralbasinroofing.com/images/roblox-hack-ios_GM431946152.pdf
    • http://centralbasinroofing.com/images/hacked-client-for-minecraft-bedrock_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a26.bin
b75353347b285a37dd5699970aef2ca9e0d37e221055cb5e49d3c253a2272044		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A26 30620 bytes
font_01_sfnt_off00008dea.bin
8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEA 3204 bytes
font_02_sfnt_off000098ed.bin
dd7a4057587595e78019333ccc667320d6d804c022730983449509c018bf4689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98ED 17788 bytes

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