Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee23e29a4511168…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 13:06:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3697747e8df5b6371dcec7caf94cdebe SHA-1: b2dfa265bc47d4b02da219ad77185fd893458576 SHA-256: 1ee23e29a4511168232895dcdb00bcf31eb60c17ba84be3bd95936da9cced620
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are related to game cheats and virtual currency, suggesting a lure for users interested in such topics. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' model strongly flagged the file. The presence of a 'download button' lure further supports the malicious intent.

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-free-spins-link-today-game-hack
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/robux-com-roblox_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-get-free-money-in-adopt-me-roblox-2021_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/google-how-do-you-get-robux_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-purple-guy-shit-free_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-human-verification_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-how-to-get-free-hats_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-new-cards-hack_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-walk-through-walls-hack-download_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-roblox-girl-clothes_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/roblox-free-app-game_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/best-admin-hack-for-roblox_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/shirt-roblox-template-free-shipping_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/coin-master-village-cost_GM406889139.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdf
    • http://royalindianjourney.co.in/uploaded_files/userfiles/files/draw-it-hack-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000320d.bin
a5cf21d2d238fa854c24acec073b8d5d162921e1465f02ea5e3d8ecfe1476835		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320D 23052 bytes
font_01_sfnt_off000065fa.bin
7527cba58b63d14438adb6ea0e8db8bf2e3aaa5804fb6e6fc3d14b43130dbaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 18696 bytes

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