Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce47d053776f7290…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 13:59:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 67f4815b6bae2764a91c4c1b3e7c8e45 SHA-1: 90d269a54bfc060c0185b341bf1bb7d3d64229de SHA-256: ce47d053776f729015a61ad29b9b9e71df82736b20a565c8aad71e2636663a25
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that point to websites offering free Robux and game hacks. The ML classifier strongly flagged this PDF as malicious. The presence of these links suggests an attempt to redirect users to potentially malicious sites for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-help-free-robux-game-hack
    • https://digilib.darmajaya.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/games-that-give-free-robux_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/minecraft-server-hacks_GM479516143.pdf
    • https://digilib.darmajaya.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-online-free-spin_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/robux-hack-no-verification_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-spins-and-coins-com_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-without-verify_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-332-apk-free-download_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/cm-spins_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/coin-master-hacks-android_GM406889139.pdf
    • https://digilib.darmajaya.ac.id/repository/microsoft-rewards-robux_GM431946152.pdf
    • https://digilib.darmajaya.ac.id/repository/free-robux-on-phone_GM431946152.pdf
    • https://krnl.rocks
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500b.bin
568f49a30d5172f36ac9838c7ebaba06ef13ca65185a4be16704f5fda1106b6c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500B 25672 bytes
font_01_sfnt_off0000899b.bin
4686decc205f725eac2af31d2bb610515d085fb80a4fbb870416018a21b04127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 18264 bytes

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