Malicious PDF — malware analysis report

Static analysis result for SHA-256 26068b7d93c695a0…

MALICIOUS

PDF

48.7 KB Created: 2021-05-14 06:08:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e467537cd1cd91facd956444f2062777 SHA-1: d997617e55a8a40bcc7c0d6e41c5744d2be593a9 SHA-256: 26068b7d93c695a09b97e71a2a66e4b6735ed82cfa40283933bf7fdd31250868
102 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. One embedded URL, 'https://netcdn.xyz/app/431946152/dailyrobux-game-hack', suggests a lure for downloading a game hack, which is likely a malicious payload. The presence of a 'download button' heuristic further supports the intent to trick the user into downloading a file. No scripts were extracted, but the overall structure and embedded links indicate a malicious intent to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/dailyrobux-game-hack
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/easy-robux-today-com_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/legit-free-spins-coin-master_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-hack-me_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-snacks-link_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/extra-free-spins-for-coin-master_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/no-robux_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-game-hack-apk_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/hack-free-spin-coin-master_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-pc-hack-download_GM406889139.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-do-you-hack-roblox_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c8f.bin
4078a8dfa2e65fdee5916ca153a0bd82f134dd97d0a31d241d2382fd60045bd3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C8F 28496 bytes
font_01_sfnt_off00008de9.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE9 5696 bytes
font_02_sfnt_off00009afa.bin
006376ad9c7b73d4fd15d3b6dd3ffa9064f0af8ff6d6cdc29d45d1e9c8c3f0f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFA 18620 bytes

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