Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ba9c6cdc8daca3…

MALICIOUS

PDF

33.9 KB Created: 2021-06-29 21:28:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1225e54c8ac924a5ca4958b259356a60 SHA-1: f3de26804e7450d3620ff6a6849eef1799c923d3 SHA-256: 99ba9c6cdc8daca338192739d948aa9a53f786d02daed2154a291e8af48ac3a2
142 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Roblox codes' and leverages a link farm of SEO-optimized PDFs, suggesting a phishing or scam attempt. The presence of numerous external links and the 'Password-protected archive handoff' heuristic indicate an attempt to trick users into downloading further content, potentially malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-roblox-codes-that-work-game-hack
    • http://library.atim.ac.id/repository/discord-free-roblox-accounts_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-robux-website-that-works-no-generator_GM431946152.pdf
    • http://library.atim.ac.id/repository/www-roblox-free-rewards_GM431946152.pdf
    • http://library.atim.ac.id/repository/robloxhackbalance_GM431946152.pdf
    • http://library.atim.ac.id/repository/roblox-gift-card-code-free-legit_GM431946152.pdf
    • http://library.atim.ac.id/repository/comment-etre-un-hacker-sur-roblox-francais_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://library.atim.ac.id/repository/how-to-get-free-robux-by-playing-roblox-games_GM431946152.pdf
    • http://library.atim.ac.id/repository/may-2021-roblox-hack_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://library.atim.ac.id/repository/how-to-get-all-the-clothes-free-on-roblox-2021_GM431946152.pdf
    • http://library.atim.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdf
    • http://library.atim.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://library.atim.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://library.atim.ac.id/repository/hackeando-mi-saldo-de-roblox-sin-pagar_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-robux-without-downloads-roblox-november-december-2021_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdf
    • http://library.atim.ac.id/repository/roblox-free-clothing-groups_GM431946152.pdf
    • http://library.atim.ac.id/repository/contrasenas-de-cuentas-de-roblox-free_GM431946152.pdf
    • http://library.atim.ac.id/repository/infinte-jump-hack-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_off00002d9f.bin
b7e77bbb45e9ef6e560d9812b296312fd19ea5bf21fe9c2dda5904ac779b960b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9F 21960 bytes
font_01_sfnt_off00005e21.bin
599decdaa1e3a39b6cba07539e7b3c2ca148550adb9c4d1b1fc5eaf311099855		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 19460 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.