Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6337b2793bf674a…

MALICIOUS

PDF

250.9 KB Created: 2021-07-03 12:45:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 080c2ef208fc4ccb767d298540067d52 SHA-1: ad407b77edc75b90bcc3f8b42db8bd531015f605 SHA-256: b6337b2793bf674a20c4af3bc9c281fd1fa19213e373c405a022a58de7238240
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of an advance-fee scam and a fake CAPTCHA lure, aiming to trick users into clicking a link. The embedded URL, http://netcdn.tw/app/1330123889/pubg-uc-details-game-hack, likely leads to a malicious payload or phishing page. The document also contains MFA harvesting lures, suggesting an attempt to steal credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • 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.
  • 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
  • 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-details-game-hack
    • http://library.unissula.ac.id/fk/repository/roblox-free-online-without-download_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-code-redeem-free_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/dominus-roblox-free-code_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/toolbox-for-minecraft-ios_GM479516143.pdf
    • http://library.unissula.ac.id/fk//repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/rocash-give-yourself-robux-cheat_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/free-minecraft-account-and-password-generator_GM479516143.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-cheats_GM406889139.pdf
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/roblox-hackprogamers-com_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/hhttp-free-robuxwin_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/how-to-hack-a-model-on-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-villages_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/coin-master-spins_GM406889139.pdf
    • http://library.unissula.ac.id/fk/repository/hacks-for-pet-ranch-roblox_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/free-roblox-svg_GM431946152.pdf
    • http://library.unissula.ac.id/fe/repository/hack-master-coin_GM406889139.pdf
    • http://library.unissula.ac.id/fk//repository/roblox-free-online-game_GM431946152.pdf
    • http://library.unissula.ac.id/fk/repository/coin-master-village-3_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037e1a.bin
9ea6ee1347b423a9a7533779d83eb8763762ce0b55b6317857c2d9467a543268		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E1A 26180 bytes
font_01_sfnt_off0003bb89.bin
3b8e20fd862589eaa84a85ba1f1e8a17c93fb5eb4745c86547c9c5d25b3b615b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB89 18592 bytes

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