Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3cefa475b0cfa9…

MALICIOUS

PDF

48.9 KB Created: 2021-06-09 10:37:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b1c84f4f61ba2aa914c743316879a5dc SHA-1: 918a830ce141af68c31729a3658bd11e7a7732ba SHA-256: 4a3cefa475b0cfa938d9ff3794be4064755aabe12d04f908249173ec97a32a64
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to distribute malicious content. The presence of a download button lure and a password archive lure further indicates an attempt to trick the user into downloading and potentially extracting a malicious payload. The primary URL points to 'cheat-engine-lua-scripts-roblox-game-hack', reinforcing the lure of game-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/cheat-engine-lua-scripts-roblox-game-hack
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-tiktok-fans-and-likes_GM835599320.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/flame-gg-free-robux-https-flame-gg-zeph_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-noclip-hack-download-ro-boxing_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-unused-roblox-card-codes-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-minecraft-client_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-legit_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-real_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/dinosaur-simulator-roblox-hack_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/minecraft-building-hacks_GM479516143.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050fd.bin
e8569e9b0e412e92c507936c3da1cd53d3c4ea2f2ef4003ad45482572f2d15d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FD 25940 bytes
font_01_sfnt_off00008d46.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D46 5696 bytes
font_02_sfnt_off00009a58.bin
7b1f8c60072cb49e49605a307a2b452c1c7649a57f3b806339adbf592dbe3319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A58 19004 bytes

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