Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b00df330680477…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 14:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a9f435bdd6ea249d88490d5eacefeee6 SHA-1: b0ff00e3e9d5ede2b62ce618818e2664f8777f41 SHA-256: c6b00df330680477d4d3ae036dd2cf6ef6d48719b3456f6bfa9ed39aca5e6067
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to external PDF files, suggesting a link farm designed to distribute malicious content. The presence of a 'Download Button' heuristic and the ML classifier's high confidence score indicate a malicious intent. The document body, though heavily obfuscated, contains references to 'Robux' and 'Coin Master', common lures for gaming-related scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/apps-for-free-robux-game-hack
    • http://tasleemdubai.com/userfiles/files/free-promo-codes-for-coin-master_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spin-trick_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/hack-master-coin-pc_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-roblox_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/free-spins-coin-master-links-app_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/free-coin-master-link-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-apk_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-no-survey-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/play-coin-master-online-free_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/roblox-sign-in-free_GM431946152.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-minecraft-java-code_GM479516143.pdf
    • http://tasleemdubai.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://tasleemdubai.com/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048bd.bin
5f99c5185f6d13a8881543b5204ccaafef5073d8389c9cc58ac6349bd4465173
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BD 25812 bytes
font_01_sfnt_off0000848f.bin
b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b
pdf-font-stream PDF embedded font (sfnt) at offset 0x848F 18192 bytes