Malicious PDF — malware analysis report

Static analysis result for SHA-256 763ad0d7e763ef10…

MALICIOUS

PDF

35.6 KB Created: 2021-07-05 07:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 147c3259599b93782ae7000fd7a47e8c SHA-1: d25736ce115c6112c7f93893399baad30c6fff7a SHA-256: 763ad0d7e763ef10ec40384a339dca562537e826ca2f63fe81b101db291b7fbf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to popular games like Roblox and Coin Master. The document body explicitly mentions 'free Robux' and provides a URL that appears to be a lure for a scam or malware download. The presence of a PDF URI heuristic and a high ML classifier score indicates 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/431946152/how-to-get-free-robux-no-human-verification-game-hack
    • https://mountainholidaytreks.com/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-meme-avatars_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdf
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-role-in-coin-master_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/all-links-for-free-spins-coin-master_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/hackear-coin-master-android_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/hack-para-tener-todas-las-transformaciones-de-dbr-roblox-2021_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-a-roblox-game-2021_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-account-generator_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/roblox-admin-hack_GM431946152.pdf
    • https://mountainholidaytreks.com/userfiles/files/coin-master-heaven-free-spins_GM406889139.pdf
    • https://mountainholidaytreks.com/userfiles/files/minecraft-windows-10-hack-client-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003600.bin
196aeaf1519f1ac1e9dfb7ed8dbdc999f657df2d30d560daa3b07c31b90e5083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3600 21372 bytes
font_01_sfnt_off000064b4.bin
1b5d617a8bdf7849f857e8bf3a00ea7a9d2795cdb388484b070bb3e34f65ceb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 19496 bytes

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