Malicious PDF — malware analysis report

Static analysis result for SHA-256 236f74f3f578faf9…

MALICIOUS

PDF

35.1 KB Created: 2021-07-02 07:28:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 62ab8a355a9aeaaa9bdc8a02d25ca576 SHA-1: d91c862abe3d312707ee6a2aa119c9bb911611d5 SHA-256: 236f74f3f578faf9b2569046c9801b7a89e2675c2a978b7aef10abf36f75a5d9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are related to game cheats and free items, suggesting a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-like links further supports a malicious intent. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

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/roblox-leaked-free-items-game-hack
    • http://battistibrothers.com/system/userfiles/files/coin-master-free-spins-daily-link-updated_GM406889139.pdf
    • http://battistibrothers.com/system/userfiles/files/free-robux-without-getting-banned_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/earn-free-robux_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://battistibrothers.com/system/userfiles/files/pagina-de-hack-para-robux-gratis_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/pokemon-go-free-evolution-trade_GM1094591345.pdf
    • http://battistibrothers.com/system/userfiles/files/picture-roblox_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdf
    • http://battistibrothers.com/system/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/pubg-uc-567_GM1330123889.pdf
    • http://battistibrothers.com/system/userfiles/files/cheat-for-guess-sthat-song-roblox_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/free-robux-working-2021_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/free-robux-hack-no-robot-verification_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/80-free-spins-coin-master_GM406889139.pdf
    • http://battistibrothers.com/system/userfiles/files/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdf
    • http://battistibrothers.com/system/userfiles/files/roblox-free-robux-codes_GM431946152.pdf
    • http://battistibrothers.com/system/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003022.bin
a74b4a2707f10a552b62d3f9a6b97f1ae4a624abad6e26f5a2ceaf870ac98a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22740 bytes
font_01_sfnt_off0000634e.bin
cfcf9e18c380510fd57c132c1c641fd172cf14d371fae5571913b55d6f8e66a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 19360 bytes

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