Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfde3e1dcf94484…

MALICIOUS

PDF

46.2 KB Created: 2021-06-10 18:51:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6eb64aba474812ea283b8588eedb002 SHA-1: 63438098a0e9974028a751bf0164dbcb8d94d079 SHA-256: abfde3e1dcf94484334d0d0e5f993c53449d090d384ed2a915722266bb00926c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick users into downloading files, likely related to game cheats or currency. It contains numerous embedded URLs pointing to various game-related PDF files, suggesting a lure for potentially unwanted or malicious downloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/hacks-that-work-for-roblox-game-hack
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-obby_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/robux-hack-generator_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/card-hack-for-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/roblox-hack-generator-secret_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-email-free-spins_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/50-000-free-spins-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005446.bin
b0b4b21bb1ecdcc89f81278b217d4d8968d75ed30331191dba3f9c5f0315fede
pdf-font-stream PDF embedded font (sfnt) at offset 0x5446 26124 bytes
font_01_sfnt_off000090ad.bin
9040e6d0224ff985eecf54452d6ab7d682aec88134d8ca1409955a89fa1fba3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90AD 18816 bytes