Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c4626b7b9663f5…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 23:27:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f3eb3188ab507e3a995c3e27b9a557b SHA-1: c85f657a961e791e69abac71900ca0b0f70eb07a SHA-256: 99c4626b7b9663f5e170eb1d1d3d0895b0ec1e2f69fb2683b008e900719375a1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are structured to appear as SEO-friendly content related to popular games like Roblox and Coin Master. The primary URL, https://netcdn.online/app/431946152/roblox-promo-codes-free-robux-game-hack, suggests a lure for free in-game currency, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/roblox-promo-codes-free-robux-game-hack
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/roblox-free-wings_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/robux-in_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/coin-master-free-link-spin_GM406889139.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/is-roblox-free-on-pc_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/free-robux-without-offers_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/free-mojang-account-with-minecraft_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/minecraft-tools_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/minecraft-114-4-download_GM479516143.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/500-free-coin-master-spins_GM406889139.pdf
    • https://digilib-bing.stkip-pgri-sumbar.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d7.bin
77397d5f0faf3dd2d1d216feac13e56ce2ee53a027980ee3ff00fa896e43181e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D7 27048 bytes
font_01_sfnt_off0000900d.bin
3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900D 18676 bytes

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