Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54b218b8af26936…

MALICIOUS

PDF

49.1 KB Created: 2021-05-15 15:38:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8c02662f200e01622faaa7cf3740daf5 SHA-1: f9e093e07627abf8778c33cbe8322e472ec20c95 SHA-256: d54b218b8af269368e2564bb61c76b1156ac9c5f9a876453e94e4ee61b2322c4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, presented as download lures for popular games, which is indicative of a link farm or phishing attempt. The primary URL, https://netcdn.xyz/app/479516143/minecraft-story-mode-free-download-game-hack, likely serves as a landing page for malicious content. The ML classifier also flagged this PDF as malicious with a high probability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/479516143/minecraft-story-mode-free-download-game-hack
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/www-roblox-com-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-fan-page-facebook_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-game-download-ios_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-by-watching-ads_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-spins-apk_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-catalog-free_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/cm-free-spin-link-today_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/minecraft-server-hacks_GM479516143.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-no-survey_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/websites-that-give-free-robux_GM431946152.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/facebook-coin-master-hack_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-spins-on-coin-master-app_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e32.bin
669e7ccdf53fd7ffb0fcb82ae9b0e14b7174e2f324219669cab54cb741ce0375		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E32 30212 bytes
font_01_sfnt_off00009257.bin
3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9257 3092 bytes
font_02_sfnt_off00009d02.bin
b60985c1befe233451c1e4628b3545798255342bb86f0eafc92eb610c8c57488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D02 18468 bytes

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