Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b54098129f26256…

MALICIOUS

PDF

32.7 KB Created: 2021-07-06 09:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c55f8227743e9d8f98c35ec9a092749c SHA-1: 7a0336cc51a10259f7dcb6974d0d98162406512c SHA-256: 2b54098129f262563bba4d74a8840981c725f3f3ecf0a08880ddf540b6aa926e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms, promoting topics like free Robux and game hacks. The primary URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-for-real-game-hack, is likely a landing page for a scam or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-robux-for-real-game-hack
    • http://opac.library.uib.ac.id/repository/royal-high-school-roblox-hacks_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/how-to-really-hack-coin-master_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/roblox-no-download-hack_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-without-offers_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://opac.library.uib.ac.id//repository/robux-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/app-store-coin-master-free-spins_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/hack-de-roblox-robux-infinitas_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://opac.library.uib.ac.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/free-robux-hacker-us_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/free-private-minecraft-server_GM479516143.pdf
    • http://opac.library.uib.ac.id/repository/roblox-hacks-for-mac-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-codes-not-used_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-hack-online-download_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a1d.bin
f24b19e8831fecb408d2084bd5e685ea4625e5df24af50a597cf24860152ae27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1D 22104 bytes
font_01_sfnt_off00005aee.bin
f4ef8dd6bf40d1c11b2a1b1182ebe3cc130548f6133d652513fc66e114cd9f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEE 19056 bytes

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