Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a205442a75d335…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 09:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 617e01937be45715ef4fba92d214980b SHA-1: 95717dff20035eec54f8379f6584647b54fa6585 SHA-256: 74a205442a75d3359bd043ba333785d8e52c9e455d531b36ef33214d07e9fbde
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting it is a lure for users to download a malicious payload, likely related to "Roblox hacks". The heuristic for a password-protected archive lure indicates that the downloaded content may be encrypted to evade initial security checks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/cupcake-hacks-roblox-game-hack PDF link annotation
    • http://elibrary.uniyap.ac.id/repository/youtube-free-robux-codes-urban420_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-hack-script-python_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-hack-client-android_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-giveaway-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-roblox-toy-codes-unused_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-cartoon-animation-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-infinite-jump-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-get-free-robux-without-buying-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-report-cheater_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/robux-free-account_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-obby-no-password-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/is-the-robux-hack-safe_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/elts-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/cheat-codes-on-assassin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-mod-menu-for-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-get-free-robux-no-waiting-instant-robux-taniminim_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/keyword-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-how-to-hack-filtering-enabled-games_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-dispenser_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/cheat-engine-roblox-youtube_GM431946152.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_004_off0000528d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528D 25432 bytes
SHA-256: 741fc72643a8c9f8c2afb93dd60906775c716f986924b91858446b7388ae6b5d
font_01_sfnt_off00008cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDF 18500 bytes
SHA-256: 656ae2e77d0d2ef76aba383bbe668f9f158de291a3e0bb529c359c18234095a5

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