Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac86bab3aa52663…

MALICIOUS

PDF

34.7 KB Created: 2021-06-23 14:10:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88252b9842ccb0fbba83474193d4a9e2 SHA-1: 4deacd552de204daefde33826f174fd89868d7f3 SHA-256: 1ac86bab3aa526633432a88c2c5744563ad7c2b266d9ff6f2b829ed8756ffbaf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which are structured as a link farm for SEO purposes, pointing to sites offering game-related cheats and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The primary lure appears to be related to Roblox and free Robux.

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.co/app/431946152/free-promo-codes-roblox-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hacking-into-roblox-in-roblox-jailbreak-story_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-on-phone-without-human-verification_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hack-for-rpg-world-on-roblox-to-get-money_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/cheats-for-robux-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-in-roblox-rocash-com_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-minig-simulator-v3rmillion_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-tix-generator_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-ipad-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-gift-card-codes-2021-unused-no-human-verification_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-building-hacks_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/www-pastebin-com-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-com-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003101.bin
e6a1de75ffdb1631080a8f5504761246b7503de956b7b9ed409dc30a2f4b20c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 22144 bytes
font_01_sfnt_off0000620f.bin
45e03afae7af1f260151d3edb1a0a3ab35e2bd18874eb1ddc5dcbe50b691d48c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 19236 bytes

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