Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb643f1b235d6b33…

MALICIOUS

PDF

250.6 KB Created: 2021-07-05 00:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94170a4b6ab23972367e61a301fcdf49 SHA-1: f9154f61e9f1ad8dd0eab72b92865ef39b4a4409 SHA-256: eb643f1b235d6b3389fb1c645a16547b9a1745a6a0f1ca33f7990e7bba3367a7
140 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam and fake CAPTCHA lure, aiming to trick users into interacting with malicious content. It contains an embedded URI pointing to a suspicious domain, likely serving as a download or phishing page. The presence of MFA lure heuristics suggests an attempt to harvest credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 7

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-uc-or-codashop-game-hack
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/real-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-win-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-hack-2021-android_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-free-coins-today_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/master-coin-free-link_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/optifine-pe_GM479516143.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/easy-way-to-get-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/coin-master-spin-link-today-free_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/minecraft-free-minecoins_GM479516143.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/robuxlove-net-free-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/roblox-free-skin_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/code-free-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/free-redeem-code-for-coin-master_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/coin-master-apk-hack-358_GM406889139.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/no-robux_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id/repository/how-to-get-free-robux-cheat-code_GM431946152.pdf
    • http://perpus.sdmuhwirobrajan3.sch.id//repository/pubg-5-uc-buy_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037c9d.bin
49ad4af7d4e4ff12c9054a603181c6b6c1f2b51c576876d3449b85daa293af99		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37C9D 25928 bytes
font_01_sfnt_off0003b9b2.bin
8f918ec8b30367a652453e5b9fb21d10b202157b124d27cdc5cfad7788ccc429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B9B2 18784 bytes

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