Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba3c7c8be803b85…

MALICIOUS

PDF

43.6 KB Created: 2021-06-11 06:46:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 24b7a70e7bc9bd117290a464941ed48a SHA-1: e8d58cb525856dd9aaef8fd8c7c52a97d5bc195c SHA-256: cba3c7c8be803b85969a6e25181010d40c5a71f434df068c2585cf674cf39078
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a prominent external URI, all pointing to websites offering 'free Robux' and game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to attract users with deceptive content. The ML classifier also flagged this PDF as malicious with high confidence. The document's purpose appears to be to drive traffic to potentially malicious sites or facilitate the download of unwanted software.

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.tw/app/431946152/youtube-how-to-get-free-robux-game-hack
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/is-coin-master-hacks-safe_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-no-apps_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-games-to-play-for-free_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-pe-texture-packs-free-download_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-hack-app_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-views-on-tiktok_GM835599320.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-xbox-360-free_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/real-roblox_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/best-free-roblox-executor_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-games-that-give-you-free-robux-2021_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdf
    • https://www.communes.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e6b.bin
43aa332b96539086a1edffc62a2a2722a4a6ce9bb5cd39bbf1f9c5b486cdb72a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E6B 24636 bytes
font_01_sfnt_off0000871b.bin
19af2615bd9086bd478ca88a6ce690b9ca3ed86297e9e30c9ccbcb4910b84991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x871B 18444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.