Malicious PDF — malware analysis report

Static analysis result for SHA-256 559ab4489c26d551…

MALICIOUS

PDF

44.8 KB Created: 2021-05-20 01:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3defd27b24c1f242169b1244bb921348 SHA-1: d99de22ab7cded92761a33306a8066b5bb5fc2d0 SHA-256: 559ab4489c26d5513711b154b2137138f7dbd0bb9a3e3b0861546afb1c014e5e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external PDF files, many of which are SEO-optimized with keywords related to free game cheats and hacks. One prominent URL, https://netcdn.xyz/app/479516143/real-minecraft-for-free-game-hack, suggests a lure for downloading malicious content. The PDF_SEO_LINK_FARM heuristic indicates a large number of these links, reinforcing the malicious intent of distributing potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/real-minecraft-for-free-game-hack
    • http://brokermortgages.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdf
    • http://brokermortgages.com/images/free-robux-no-human-verification_GM431946152.pdf
    • http://brokermortgages.com/images/minecraft-launcher-free_GM479516143.pdf
    • http://brokermortgages.com/images/get-free-robux-2021_GM431946152.pdf
    • http://brokermortgages.com/images/coin-master-hack-twitter_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdf
    • http://brokermortgages.com/images/coin-master-get-free-cards_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-game-hack-version-download_GM406889139.pdf
    • http://brokermortgages.com/images/roblox-com-www_GM431946152.pdf
    • http://brokermortgages.com/images/free-robux-generator_GM431946152.pdf
    • http://brokermortgages.com/images/coin-monster_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://brokermortgages.com/images/free-robux-hack-generator_GM431946152.pdf
    • http://brokermortgages.com/images/claim-coin-master-free-spins_GM406889139.pdf
    • http://brokermortgages.com/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • http://brokermortgages.com/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://brokermortgages.com/images/claim-free-spins-coin-master_GM406889139.pdf
    • http://brokermortgages.com/images/coin-master-mod-version-free-download-v344_GM406889139.pdf
    • http://brokermortgages.com/images/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004beb.bin
20ccc75202adb59264d8cb40b36defa089b3f3838e27b2fad675179feb2029f9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEB 24836 bytes
font_01_sfnt_off00008431.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8431 2940 bytes
font_02_sfnt_off00008e41.bin
d9b0d0c4c4ee4a540b7fb0061982a790ffe87580883f4fb909ed1eb0697febb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E41 17784 bytes

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