Malicious PDF — malware analysis report

Static analysis result for SHA-256 2870d41cc1ad9f21…

MALICIOUS

PDF

34.3 KB Created: 2021-06-22 03:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3ef06e915e66f017ca1550ff97d091a2 SHA-1: e80f6084863fe94f5741eb1b33073b880593f1b9 SHA-256: 2870d41cc1ad9f214adf856278c47df69e265cfae02d45db774fdca699d36f6c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes game hacks and cheats, indicating a lure for users to visit malicious websites. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of these links are present, likely to distribute malware or conduct phishing. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this file.

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/hack-spray-paint-roblox-libary-game-hack
    • http://eurosystemssrl.it/images/roblox-how-to-hack-peoples-accounts_GM431946152.pdf
    • http://eurosystemssrl.it/images/free-gift-in-big-paintball-roblox_GM431946152.pdf
    • http://eurosystemssrl.it/images/roblox-no-download-hack_GM431946152.pdf
    • http://eurosystemssrl.it/images/roblox-how-to-get-free-lvl-7-hack_GM431946152.pdf
    • http://eurosystemssrl.it/images/free-minecraft-account-and-password_GM479516143.pdf
    • http://eurosystemssrl.it/images/cheats-and-codes-for-snow-shoveling-simulator-roblox-pc_GM431946152.pdf
    • http://eurosystemssrl.it/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://eurosystemssrl.it/images/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • http://eurosystemssrl.it/images/free-roblox-promo-codes-september-2021_GM431946152.pdf
    • http://eurosystemssrl.it/images/free-robux-stream_GM431946152.pdf
    • http://eurosystemssrl.it/images/como-hackear-coin-master-iphone_GM406889139.pdf
    • http://eurosystemssrl.it/images/free-robux-no-survey_GM431946152.pdf
    • http://eurosystemssrl.it/images/buxblast-com-robux_GM431946152.pdf
    • http://eurosystemssrl.it/images/https-www-roblox-com-robux-free_GM431946152.pdf
    • http://eurosystemssrl.it/images/free-robux-that-actually-works_GM431946152.pdf
    • http://eurosystemssrl.it/images/daily-free-spins-coin-master_GM406889139.pdf
    • http://eurosystemssrl.it/images/free-tiktok-likes-2021_GM835599320.pdf
    • http://eurosystemssrl.it/images/hack-crack-for-coin-master-currency_GM406889139.pdf
    • http://eurosystemssrl.it/images/free-minecraft-games-for-kids_GM479516143.pdf
    • http://eurosystemssrl.it/images/roblox-robux-hack-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002c6d.bin
0a5ccaed7f87b3b321e62be4dff2234944b0c584c650815c823eae8540732bd6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C6D 22900 bytes
font_01_sfnt_off00006013.bin
26e664b7cdf8d69f014769b35d482e7eae60a48c12e226741a022e224a436fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 19388 bytes