Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cd191e23642bc6…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 18:35:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3d548948ab78ffd842899b1e06ed2cea SHA-1: 539343ac7e07d8e9d9d7f4c21c2909d5c8790e70 SHA-256: 39cd191e23642bc68b4fdd9a483c4ccae38546b039844a175b42b4810aee2080
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links to game-related cheats and freebies. The primary URL, http://netcdn.tw/app/431946152/roblox-cheat-gamepass-game-hack, suggests a lure for downloading potentially unwanted or malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/431946152/roblox-cheat-gamepass-game-hack
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-minecraft-skins-pc_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-do-u-get-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-minecraft-domain_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-promo-codes-roblox_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-coin-master-gift-link_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-hack-tool-exe_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/uprobuxcom-free-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/get-free-robux-without-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/spinuri-gratis-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fad.bin
f9eb8f64c4a7a4be818fe0e13cd222ae5458f200d3dcd08d1fa479911dd0f936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 21952 bytes
font_01_sfnt_off00006030.bin
b57025e68a4fae07c45cab3668a4aa76da75e8d3c29646727eb0e2d794995c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6030 19192 bytes

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