Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3e6b6a2c6de8f1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 01:40:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18b6709015730575553fd691d1b7658f SHA-1: ee28f688bde90fe676443c3fad52f88b41fb4807 SHA-256: 3e3e6b6a2c6de8f130b2163b32c3db9823b82d08f69ba794c4fe052263d61925
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to websites offering free in-game currency or hacks for popular games like Roblox and TikTok. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to redirect users to potentially malicious sites. No scripts were extracted, but the embedded URLs and the link farm heuristic indicate a phishing or scam attempt.

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/835599320/tiktok-free-likes-and-views-game-hack
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-speed-hack-download-free-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/classic-minecraft-net-hacks_GM479516143.pdf
    • https://fib.ub.ac.id/sac/repository/spin-coin-master-hack_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/how-do-you-get-free-roblox_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/free-robux-com-real_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/1x1x1x1-roblox-id_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-no-offers-no-survey_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-grab-the-child-hacks_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/vortexx-how-to-get-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/hacks-for-roblox-sript-reader_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-admin-on-roblox-with-cheat-engine-64_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-app_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-online-2021_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-pants-for-free-on-roblox-without-bc_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/free-spins-coin-master-links-twitter_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-play-online-free_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/game-give-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000300d.bin
13b2629dedaf1f9b019f09feffeb0a5cce9bdfb59b8ebf876e3a93c16965fd2d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x300D 22480 bytes
font_01_sfnt_off00006256.bin
ddb7f5c22d7e2ffbc8c440c2183cd3b50eb71780f86fcb2e8599157d081bee44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 18444 bytes

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