Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd0c8afd4db1dc4…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 14:36:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 616226590499ea241bc8da834316556f SHA-1: 90faae9d547c806bde03b0b37f6b2914ba7b7610 SHA-256: ccd0c8afd4db1dc4ede5da529d4bb26deddccddb5993e175f1016cad7a01773d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into downloading a payload, as indicated by the 'SE_FAKE_CAPTCHA' and 'SE_DOWNLOAD_BUTTON' heuristics. The embedded URLs, such as https://netcdn.online/app/431946152/free-robux-for-kids-no-verification-game-hack, likely lead to the malicious download. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-for-kids-no-verification-game-hack
    • http://perpus.smkn1pemangkat.sch.id/repository/free-roblox-cad-code_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/promo-codes-for-free-robux_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/roblox-apk-hack_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-app-hack_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/robux-come_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/rbx-website_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/toolbox-for-minecraft-pe_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/fan-page-coin-master_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/how-to-get-a-free-raid-pass_GM1094591345.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-minecraft-java-edition-account_GM479516143.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/is-coin-master-free_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/free-robux-codes-2021-real_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-robux-that-actually-works_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id//repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/free-spin-link-coin-master-app_GM406889139.pdf
    • http://perpus.smkn1pemangkat.sch.id/repository/coin-master-free-pet-food_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000539d.bin
449bbe84f5bd23e6c628631ea7317e6a655807b383dfceca7e784128361b5592		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539D 25496 bytes
font_01_sfnt_off00008f24.bin
abcd165e4b695e85902e5e0162dd8c883b494cae8faf27dbfb1f0dc34095f980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F24 18776 bytes

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