Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df3bcf35ba30884…

MALICIOUS

PDF

43.4 KB Created: 2021-05-19 09:31:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 221312b984ecd03873d372c518a8f48b SHA-1: 619edb804c39ce3b7f12c4adaf520dbd7fa5778e SHA-256: 9df3bcf35ba30884f8e9b82273137c1373948f9b4975db3726ef3c036f7399d7
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially harmful content related to game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a deceptive attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/how-you-get-free-robux-game-hack
    • http://tasleemdubai.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spin-link-list_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/generator-robux_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-spin-sites-for-coin-master_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-minecraft-maps_GM479516143.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-ios-app_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/www-coin-master-hack_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://tasleemdubai.com/userfiles/files/can-pokemon-go-free-remote-raid-pass_GM1094591345.pdf
    • http://tasleemdubai.com/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-safe_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004afd.bin
d6d56e522e5c8c43b5670320036944ed2bd4cd9f22be46f74b6bb02ccd09ee23		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFD 25964 bytes
font_01_sfnt_off000086f7.bin
d3aeb47c5138bb2f7afdc1cd1986e008461219f841fd4d3ae6acb877e9db5a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 18444 bytes

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