Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcf5c2beea5036f…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 04:19:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07ddf1b72a4d65f1cd806045a056e04c SHA-1: ca8671158442c1decc7286f5354ed250a3cfd76e SHA-256: 2dcf5c2beea5036fb73bb2443b5968fc724e3717d7bbdb265b7df28389ad6f2d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to external files hosted on domains associated with game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of a 'Password-protected archive handoff' lure further suggests that the document is designed to trick users into downloading encrypted malware, which would then require a password provided separately.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/alone-battle-roytale-roblox-hacks-game-hack PDF link annotation
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-whatsapp-tik-tok-status-download_GM835599320.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/pokemon-go-free-7k-eggs_GM1094591345.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000506f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506F 24900 bytes
SHA-256: 6c37d7ed32bc7a99a6d22d536c752f1f99d5dff7226a5a343960d384bc699c48
font_01_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 2908 bytes
SHA-256: e28d2c57f35643e2026f86c34ac3bb63cba74be3f6c066e81aba6d285e5a121b
font_02_sfnt_off00009403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9403 18468 bytes
SHA-256: b6379d957b4eedc8f575092b6e5f5ea5d279279306c7e1d03736a7e53e417c77

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