Malicious PDF — malware analysis report

Static analysis result for SHA-256 0448c4f408270c46…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 23:14:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 872b9a5b6b47e0403634c1b7763e849d SHA-1: 1fc1876e242d511f3a53c3c94b64bd691a318da0 SHA-256: 0448c4f408270c46caac10024cc8a9ac3b49308264f5f7e2add75110d76a2aef
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to sites offering game-related cheats and free items. The heuristic 'PDF_SEO_LINK_FARM' and the presence of the URL 'http://netcdn.tw/app/406889139/coin-master-daily-game-hack' strongly suggest a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF with high confidence.

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.tw/app/406889139/coin-master-daily-game-hack
    • http://library.stikessuakainsan.ac.id/repository/how-to-play-minecraft-for-free_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-catalog-items-list_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-gift-card-codes-2021-not-used_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-military-shirt-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-base-wars-hack-god-mode_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/get-free-robux-without-human-verification_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-spin-links-coin-master-2021_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-full-free-download_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-money-hack-cheat-engine_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-candy-meme_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-a-penguin-in-roblox-for-free_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/best-free-roblox-injector_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-spins-for-coin-master_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-x-ray-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fa6.bin
becfcdf69a03e2292e37509caa224e6758a4dd17cc8576805d7f0e668cde67d1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA6 23068 bytes
font_01_sfnt_off00006397.bin
e5d2ae62ab428ccdde8c51a6c881ab5f3030241469dbfaa385cbaf7884f98516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 18256 bytes

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