Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ab9017f95c1706…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 23:49:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 502a1abb6b700a6d1dd91946eaffa62d SHA-1: 654e65b01236977a35f1b2b25e323995915a2f67 SHA-256: d8ab9017f95c17065b4cfb91e8b808bb04d17621e625c21f4e39ffb82e164e53
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes 'free stuff' for popular games, indicating a lure for users to click through to potentially malicious websites. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of these links are designed to appear as legitimate content, likely for SEO manipulation or to host further malicious content. The ML_NYX_PDF_MALICIOUS score of 0.998 strongly supports the malicious classification.

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.tw/app/431946152/how-to-get-free-stuff-on-roblox-game-hack
    • http://www.alrashed-alsaleh.com/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-card-link-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/hack-de-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-pet-snacks_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/how-many-villages-are-in-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-minecraft-java-edition_GM479516143.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/www-coin-master_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-game-download-free_GM406889139.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-tiny-tanks-cheats_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-com-avatar-free_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdf
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f15.bin
90f7013c65603287813742f3bf8477c26909eb570087dd96e84ef729d0013299
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F15 21980 bytes
font_01_sfnt_off00005f6c.bin
4c8152de48653702d530bfede1eacb36ad7a4bd714fdb4c93f232e1a84fba55a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 19056 bytes