Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec33b18526e7688b…

MALICIOUS

PDF

44.0 KB Created: 2021-05-18 00:52:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 70fabe550f7c5ee5afc12259268a3594 SHA-1: 5acb1d239864803c38a0650d030a5d727d68946d SHA-256: ec33b18526e7688bb72e899a2bd0de0993420d9122f93c23bde24948fadeb0ca
82 Risk Score

Malware Insights

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

The document uses a social engineering lure, specifically a fake download button for a Minecraft client, to trick users into clicking a malicious URL. The heuristic 'SE_CLICKFIX' indicates the document likely instructs the user to execute a command, bypassing macro restrictions. The presence of multiple PDF URIs and embedded URLs suggests a downloader or redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-client-download-game-hack PDF link annotation
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-free-spin-27_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/robux-free-gift-card_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
stream_003_off00004f89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F89 26472 bytes
SHA-256: fa33f843e5b7b64a8014dccf4df7580d26f370a20a05b338f9f8e36d64359cc0
font_01_sfnt_off000089d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D6 18292 bytes
SHA-256: df528b26126d4fc11b7eeaa3b1f911f76ffca14ff52ae065bc56290066d0d251

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