Malicious PDF — malware analysis report

Static analysis result for SHA-256 58030ac3df05940b…

MALICIOUS

PDF

36.4 KB Created: 2021-06-26 23:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 23798666ae903520aacd60f1b39e499d SHA-1: 7d637ba4e20f76bc1df80cbaaa7f299dbe6e69fc SHA-256: 58030ac3df05940bf53fe0f71fd7da4fde8521c30e9bbf4afdafce215dc15fc8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document displays a fake CAPTCHA to lure the user into interacting with embedded links, which is a common social engineering tactic. The presence of multiple URLs related to 'free robux' and 'coin master' hacks suggests a scam or phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.co/app/431946152/pg-family-friendly-roblox-content-free-robux-2021-game-hack
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-giveaway-groups_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/como-tener-mucho-dinero-en-jailbreak-roblox-hack_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-app_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/how-to-block-someone-on-coin-master_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-ios_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/optifine-mcpe_GM479516143.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/claimrbx-free-robux_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/can-i-download-minecraft-for-free_GM479516143.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/mobihack-roblox-hack_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-free_GM479516143.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-earn_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-code-generator-dangerous_GM431946152.pdf
    • https://elearningmts.isl.sch.id/__statics/gudangsoal/files/free-robux-generator-only-today_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000350b.bin
b1cf57b71e76d95c7582667d211cccbeeaf0c390b282572707e97756e493a0e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x350B 22068 bytes
font_01_sfnt_off000065ef.bin
8cc2ecb9748a7cfb1ced06af4db0d1673bf6e8a83c3c9ce2714e4546f8979f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EF 20184 bytes

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