Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90cad1333da1f0d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 14:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a8d59e12cf1e5620a6b7150f02270e68 SHA-1: 253a83e30d69d2f7b0f1ea9a04ad4c626fb7b310 SHA-256: e90cad1333da1f0d49e6996e37ce50304edefcfe7fa571f3fb98c21cac59c1fd
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including a prominent one to 'netcdn.tw', which is likely intended to trick the user into downloading a malicious application disguised as a game hack. The ML classifier strongly indicated maliciousness, and the presence of a "download button" lure further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-online-download-game-hack
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/minecraft-xbox-360-free-download-code_GM479516143.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hack_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/horse-valley-beta-roblox-maze-cheat_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/free-roblox-executor-no-key_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-on-iphone-2021_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/coin-master-blogspot-free-spins_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/coin-master-cards-free-cards_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/unlimited-spin-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/roblox-counterstrike-hack_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/coin-master-gifts_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/easy-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/roblox-fedora-free_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/free-robux-images_GM431946152.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn1ae.sch.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f9.bin
93119705e99c0fd08c387873fe445689d33ca70d80fa533455ca9bc3243c81f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F9 23388 bytes
font_01_sfnt_off000066d4.bin
4701bace70065662dff968d3c735592f6c7051dc1bd468cd18b2781b9458448c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 18584 bytes

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