Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d0e7e57d5f8d00…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 02:44:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2d5f92ee4da05196d3d2a1fd343a546 SHA-1: b1abaf4bab5f401c192126bd024de8781c0d2c8b SHA-256: d8d0e7e57d5f8d009f2fbc4fb5382631bdb0e3cd3fe86851b592e5a58e6f9a4b
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to game-related terms and a URL that likely leads to a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-com-free-dominus-game-hack
    • http://safwafurniture.com/images/bloodborn-roblox-hack_GM431946152.pdf
    • http://safwafurniture.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://safwafurniture.com/images/free-robux-glitch-2021_GM431946152.pdf
    • http://safwafurniture.com/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://safwafurniture.com/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://safwafurniture.com/images/coin-master-daily-spin-link-app_GM406889139.pdf
    • http://safwafurniture.com/images/coin-master-free-spin-app-reviews_GM406889139.pdf
    • http://safwafurniture.com/images/roblox-dominus-frigidus-free_GM431946152.pdf
    • http://safwafurniture.com/images/minecraft-java-free-account_GM479516143.pdf
    • http://safwafurniture.com/images/free-robux-generator-without-human-verification_GM431946152.pdf
    • http://safwafurniture.com/images/free-robux-no-generator_GM431946152.pdf
    • http://safwafurniture.com/images/free-minecraft-skins-pe_GM479516143.pdf
    • http://safwafurniture.com/images/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://safwafurniture.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://safwafurniture.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdf
    • http://safwafurniture.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://safwafurniture.com/images/apps-to-get-free-robux_GM431946152.pdf
    • http://safwafurniture.com/images/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://safwafurniture.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://safwafurniture.com/images/hack-free-spin-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520b.bin
3bf9858107c9e8c08d95e8b53cdb2f5ed765e28b182ffdda5f098054979ac958		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520B 24492 bytes
font_01_sfnt_off00008a53.bin
62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A53 6636 bytes
font_02_sfnt_off00009a60.bin
8e757d24a89def767d85762b06f88893ad60d12de6178202961a2c2ddd70c039		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A60 18636 bytes

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