Malicious PDF — malware analysis report

Static analysis result for SHA-256 7291b6ea1eb0086d…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 19:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 139c9583d2f85b8a059554168fd83b48 SHA-1: ac58858a40a58f786ecdd79d2f187f5e1fd2d752 SHA-256: 7291b6ea1eb0086d1d85b3f4ab91066b4653141f85db95f1db2e7806df591b52
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering game-related content, suggesting a link farm or phishing lure. The presence of a download button heuristic and the ML classifier's high confidence score indicate malicious intent. The document likely serves to redirect users to malicious websites that may host malware or phishing pages.

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/479516143/minecraft-for-chromebook-free-game-hack
    • http://sttlets.education/senayan/repository/roblox-funny-hacking_GM431946152.pdf
    • http://sttlets.education/senayan//repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://sttlets.education/senayan/repository/how-to-get-cheat-engine-on-roblox_GM431946152.pdf
    • http://sttlets.education/senayan/repository/do-roblox-employees-get-free-robux_GM431946152.pdf
    • http://sttlets.education/senayan/repository/hacking-how-to-fly-in-roblox-at-any-game_GM431946152.pdf
    • http://sttlets.education/senayan/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://sttlets.education/senayan/repository/how-do-you-make-tshirts-free-roblox_GM431946152.pdf
    • http://sttlets.education/senayan//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://sttlets.education/senayan/repository/roblox-gang-rape_GM431946152.pdf
    • http://sttlets.education/senayan/repository/roblox-free-robux-es_GM431946152.pdf
    • http://sttlets.education/senayan//repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://sttlets.education/senayan/repository/www-roblox-com-free-items_GM431946152.pdf
    • http://sttlets.education/senayan/repository/https-www-roblox-cheat_GM431946152.pdf
    • http://sttlets.education/senayan/repository/hex-number-gives-free-robux-robuxian_GM431946152.pdf
    • http://sttlets.education/senayan//repository/coin-master-free-cards-and-spin-link_GM406889139.pdf
    • http://sttlets.education/senayan/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdf
    • http://sttlets.education/senayan/repository/can-you-get-robux-for-free_GM431946152.pdf
    • http://sttlets.education/senayan/repository/earn-robux-today_GM431946152.pdf
    • http://sttlets.education/senayan//repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-2021-instantly_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe4.bin
050839a3b43c83a1b2a7e0a3ff54985cb8bef1d0862c35d4815c9b56cbf6067b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE4 21748 bytes
font_01_sfnt_off00005f57.bin
616ab3f700462aed481386b22979965c6dca6356bf91b8a6a5de3323c758484c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 18752 bytes

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