Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af0b9c1404eff4f…

MALICIOUS

PDF

47.9 KB Created: 2021-06-13 16:10:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c79108d0904f24cdab2c550d14fb57f SHA-1: d297f70a81b753a368ef8cb0816e0e1c289e798f SHA-256: 8af0b9c1404eff4f5831a91aecfee4a5707e2ae49ac564e6fc46fcadfdb28953
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, indicated by the SE_FAKE_CAPTCHA heuristic. It also includes an external URI pointing to a suspicious URL, likely intended to trick the user into downloading a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-builders-club-roblox-no-human-verification-game-hack
    • http://www.art-concept.gr/images/master-coin-free-spin_GM406889139.pdf
    • http://www.art-concept.gr/images/roblox-phantom-forces-hack_GM431946152.pdf
    • https://art-concept.gr/images/roblox-health-hack-cheat-engine_GM431946152.pdf
    • http://www.art-concept.gr/images/coin-master-hack-ios-jailbreak_GM406889139.pdf
    • http://www.art-concept.gr/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://www.art-concept.gr/images/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://art-concept.gr/images/roblox-cool-t-shirts-free_GM431946152.pdf
    • https://art-concept.gr/images/roblox-sword-fighting-tournament-points-hack_GM431946152.pdf
    • https://art-concept.gr/images/colossus-legends-roblox-hack_GM431946152.pdf
    • http://www.art-concept.gr/images/free-robux-2021_GM431946152.pdf
    • https://art-concept.gr/images/site-cheat-roblox_GM431946152.pdf
    • https://art-concept.gr/images/free-codes-to-get-robux_GM431946152.pdf
    • https://art-concept.gr/images/free-apps-to-get-free-roblox_GM431946152.pdf
    • http://www.art-concept.gr/images/free-robux-earn_GM431946152.pdf
    • http://www.art-concept.gr/images/free-minecraft-wallpaper_GM479516143.pdf
    • https://art-concept.gr/images/roblox-waterpark-noodle-for-free_GM431946152.pdf
    • http://www.art-concept.gr/images/roblox-data-breach_GM431946152.pdf
    • https://art-concept.gr/images/hack-de-roblox-2021_GM431946152.pdf
    • http://www.art-concept.gr/images/roblox-free-items-glitch_GM431946152.pdf
    • http://www.art-concept.gr/images/minecraft-for-ipad-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000525e.bin
82fb0fb0f858a8956e56a34b227eda86261f258587fb0a4b38f293da7641bd28		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525E 24636 bytes
font_01_sfnt_off00008b1b.bin
6a7975596977eeee95ccc4c8d4116b513ad6d04388cbdc1cd81e9b8ea1d459b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1B 3136 bytes
font_02_sfnt_off000095f0.bin
fe782848b8973837ca4e2d6e386e6ace10ec17def965fb9b7577347b001e2e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F0 19108 bytes

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