Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fde7f4f1bfb17a…

MALICIOUS

PDF

35.5 KB Created: 2021-06-28 23:16:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bd3a4d81674fad7db0d9df7b6a096ae5 SHA-1: 06031b914c54810cfe381a9c08eb3941c66cbb43 SHA-256: c4fde7f4f1bfb17a8fd489ca3a9e1c517106173f945930179225cb621c065873
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites that promise free Robux or Coin Master spins. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent. The presence of a 'download button' lure further supports the conclusion that this document is designed to trick users into navigating to potentially harmful external resources.

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-promo-codes-free-robux-game-hack PDF link annotation
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-adopt-me-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-to-hack-an-old-roblox-account_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/how-do-you-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/roblox-hack-tools-in-the-game-no-mega_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://promoindihomejateng.com/ckfinder/userfiles/files/hacking-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3488 22148 bytes
SHA-256: 59501f9d0016ff1b2fdd2fda2480b09da570e67d239114d725b248dc49d5b3b6
font_01_sfnt_off000064ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 19380 bytes
SHA-256: f599988ad614928277529a5070f43d57f30efd84bc389ab6e612c4c8b358aa39