Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a77129fdb9665f…

MALICIOUS

PDF

250.5 KB Created: 2021-07-05 12:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 495bc45294f555fe488bea96c17bcdb8 SHA-1: 4e8212eed2f0259e86dee766c53a8c70cecac64c SHA-256: e9a77129fdb9665f48ab0b4d4ae0f4d5660c34e452186f89bfafacc56e8cf6ee
140 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Apple, presenting a fake CAPTCHA or MFA prompt to trick the user into clicking a malicious link. The embedded URL, http://netcdn.tw/app/1330123889/pubg-uc-pakistan-game-hack, is hosted on a domain that does not match the impersonated brand, indicating a credential harvesting or phishing attempt. No scripts were extracted, but the heuristics strongly suggest a phishing attack.

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
  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/1330123889/pubg-uc-pakistan-game-hack.
  • 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-pakistan-game-hack PDF link annotation
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-speed-hack-2021-pet-simulator_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/speed-hack-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.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_024_off00037d30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D30 25928 bytes
SHA-256: fc5fb8d05acb16f23277972f8dbf37c86d31f03982b7832c9bd625b455ef135b
font_01_sfnt_off0003ba4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA4D 18520 bytes
SHA-256: 60516d44e5b4adb03fffdf52782c51abfd20943271a78b2d4786564fe9b0fc44

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