Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcbe78fc657d4fd…

MALICIOUS

PDF

35.6 KB Created: 2021-07-08 19:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3e82e549f665a077ec60b237ecef9e76 SHA-1: c8ec38b13b9daab908cb9983ccb8df894100fb17 SHA-256: edcbe78fc657d4fdf827ee5ecd9fbdaae61d5ca7ac6093abd35d384178170733
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a prominent call-to-action related to game cheats, strongly suggesting a lure for downloading malicious content. The heuristic for a password-protected archive handoff indicates that the actual payload is likely encrypted, further supporting a malicious intent to bypass security controls. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/free-spin-gratis-coin-master-game-hack PDF link annotation
    • http://akbidprimahusada.ac.id/elibrary/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-hack-into-anybodys-roblox-account_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/robux-survey_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/como-hackear-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-welcome-to-roblox-building-hack_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/hack-account-roblox-download_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-make-a-roblox-aimbot-cheat_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F5 23024 bytes
SHA-256: dd1ab7cc880ebf0dee4fce8046a2badec011144335dade0bb0a9f11178cfe0d9
font_01_sfnt_off000068d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 18176 bytes
SHA-256: 18c2c947ef46c372341a4a1bc1ad78c4cd46a49342db834d5caa4979205468cd

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