Malicious PDF — malware analysis report

Static analysis result for SHA-256 8849a31dd7fd8591…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 10:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe6b1f92258d9da17f50cea83c520ce9 SHA-1: 0aaf0d7682bbc885cdd93d8357dd1bdd179e7567 SHA-256: 8849a31dd7fd85915d6812824cc17a5d70ea0509082b0fee01967b681f34e304
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links disguised as offers for free Robux and Coin Master spins, a common lure for phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/change-your-birthday-to-this-date-for-free-robux-game-hack
    • http://safari-crimea.com/images/websites-that-give-you-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/tc3-roblox-hack_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-get-free-robux-glitch-2021_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-help-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/roblox-hack-mad-merder-2-game_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://safari-crimea.com/images/how-do-i-get-robux-on-roblox_GM431946152.pdf
    • http://safari-crimea.com/images/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://safari-crimea.com/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • http://safari-crimea.com/images/coin-master-links-free-spins_GM406889139.pdf
    • http://safari-crimea.com/images/hacks-on-how-to-get-free-robux_GM431946152.pdf
    • http://safari-crimea.com/images/free-roblox-premium_GM431946152.pdf
    • http://safari-crimea.com/images/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://safari-crimea.com/images/free-robux-easy_GM431946152.pdf
    • http://safari-crimea.com/images/is-minecraft-java-free_GM479516143.pdf
    • http://safari-crimea.com/images/roblox-get-free-plus-on-meep-city-working-2021_GM431946152.pdf
    • http://safari-crimea.com/images/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://safari-crimea.com/images/roblox-tnt-rush-hack_GM431946152.pdf
    • http://safari-crimea.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://safari-crimea.com/images/robux-for-free-2021-no-vertification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b3b.bin
d4b08ec3981ac61f7447c8de4c32a91a41826a2fc337a9a8b28664e04e60ce52
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3B 22808 bytes
font_01_sfnt_off00005df7.bin
32334ed13a8f9ea7997d2e6210521125d5c2208e61fcb6b285c17446a1876bf9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF7 19788 bytes