Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb5b0922351beef…

MALICIOUS

PDF

47.7 KB Created: 2021-05-15 17:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 444599c36ad69031d26f0f3e11514ec5 SHA-1: 931b42affe96754412ae17e8fd8f63e17ff8f018 SHA-256: aeb5b0922351beef957a4257196203bcfc878207bfdd4e8251e76a8712a9e491
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to sites offering 'free Robux' or game hacks. This suggests a link farm or phishing campaign designed to drive traffic to potentially malicious websites. The ML classifier also flagged this PDF as malicious, reinforcing the suspicious nature of the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/431946152/google-how-do-you-get-free-robux-game-hack
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-robux-with-no-survey_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-minecraft-printables-food-labels_GM479516143.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-can-i-play-minecraft-for-free_GM479516143.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-spin-hack_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-free-500-spins-link_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coinmaster-twitter_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/grab-points-login_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-raid-hack_GM406889139.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdf
    • https://elearningaliyah.almubarakddi.org/__statics/gudangsoal/files/coin-master-offline-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b70.bin
5e2fe7d971e9c3b55d86432726f8c39842e98c3c99c3f860bbd6e347d15dc8d8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B70 26656 bytes
font_01_sfnt_off00008a65.bin
e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A65 3500 bytes
font_02_sfnt_off00009606.bin
7e42234451cc840f7005e057c881a5adaeb6eb05dfbb8a23217c49a1ae6b06df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9606 18972 bytes

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