Malicious PDF — malware analysis report

Static analysis result for SHA-256 d398be5843b44a8e…

MALICIOUS

PDF

228.3 KB Created: 2021-07-06 03:04:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ccd80b6477ec540a7db1bdeed9e7ff7e SHA-1: 8e5548bbef548c570f35e7a74247e9180ac8bff8 SHA-256: d398be5843b44a8e558880594946e74b2c1b1e005a311406cd76e477e5baf11d
132 Risk Score

Malware Insights

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

The document employs social engineering tactics, including a fake CAPTCHA and a browser extension installation lure, to trick users into downloading potentially malicious content. The embedded URL points to a site offering game hacks, further supporting a malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious download site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-3d-model-game-hack
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-can-i-play-minecraft-for-free_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-hack-me-robux_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/pokemon-go-free-99_GM1094591345.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/minecraft-story-mode-free-download_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/coin-master-free-coins-spins_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-free-spin-app-iphone_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/password-free-roblox-accounts_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-free-robux-no-subscribing_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-deadzone-hack_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/blogspot-coin-master-spins_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-hack-100-working_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/best-free-roblox-screen-recorder_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-cheats-free-spins_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-roebucks-no-human-verification_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-free-robux-no-hack-no-survey_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/one-piece-millennium-roblox-free-private-server_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off000324d3.bin
47a2cc60e3c846279e882c9270bb51e55f126cdfb71ebe1afb5a9cf414dc24bc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324D3 25576 bytes
font_01_sfnt_off000360d1.bin
ce014eb0f2af6cec10f981d469db24101ba83da1675d3412196caede973012e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x360D1 18948 bytes

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