Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4eb74f83d95f3b5…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 07:26:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ab55ac3fcf77a6a8bbd830945ab5b363 SHA-1: aad8a71f3e3da4c4ea893dfb64dd0c9292a5bd01 SHA-256: d4eb74f83d95f3b5e510473f8298a4a61bd071aace7fe7c3f5b06d9ba35404ff
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links. These links predominantly relate to game cheats and free in-game currency, suggesting a lure for users interested in such topics. The presence of a visual download button heuristic further supports the idea that the document is designed to trick users into clicking through to potentially malicious content or downloads.

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.tw/app/431946152/how-to-make-hack-models-in-roblox-game-hack
    • http://library.atim.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdf
    • http://library.atim.ac.id/repository/minecraft-free-download-mac_GM479516143.pdf
    • http://library.atim.ac.id/repository/free-robux-generator-no-survey-no-download-no-verification_GM431946152.pdf
    • http://library.atim.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://library.atim.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://library.atim.ac.id/repository/how-to-earn-free-robux_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdf
    • http://library.atim.ac.id/repository/video-free-robux-obby_GM431946152.pdf
    • http://library.atim.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdf
    • http://library.atim.ac.id/repository/free-robux-no-offers_GM431946152.pdf
    • http://library.atim.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdf
    • http://library.atim.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdf
    • http://library.atim.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://library.atim.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://library.atim.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://library.atim.ac.id/repository/free-shirts-and-pants-in-roblox_GM431946152.pdf
    • http://library.atim.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://library.atim.ac.id/repository/robux-apk_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000515b.bin
1c5ed46d4b717f5c6d7cccc652590063fd5bee26c001793411476f6041659c3a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515B 27328 bytes
font_01_sfnt_off00008e6f.bin
d0ae454f3b8743a56db1d08076517b03586f05ef2ebea893f02121fbac897ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6F 18716 bytes

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