Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00822efb667f860…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 00:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d9a7bc1534141757b5966b77a92b488f SHA-1: e7d7a54dc0d66fcef2da8dc9fc544c5607c4fbfe SHA-256: f00822efb667f8604bb11404b147769ed57020e3f2997e91780da7369ac5d741
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which appear to be part of an SEO link farm designed to drive traffic to gaming-related scam pages. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-coins-for-planet-master-game-game-hack
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/get-robux-com_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/can-i-get-free-robux_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/get-robux-today_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdf
    • https://www.repository.ptiq.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/get-more-robux_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/roblox-hack-ios_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000523c.bin
4d4803c31fd121a9efd56190fb67e0133fc16a0e191a9dc7f6103e8876db7a9b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523C 24988 bytes
font_01_sfnt_off00008a27.bin
c562c37ec85c1a31376f1319708a817f13e9ce9d6f96008aa36ac2301c2a7916		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A27 18196 bytes

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