Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d65d688b2dee2e…

MALICIOUS

PDF

226.3 KB Created: 2021-07-05 18:57:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b4b31f31debd44fed1689914f158e16f SHA-1: 1f1f22bff9bc4ab018ce49b340f4e4b7fef9abaf SHA-256: a1d65d688b2dee2e1728f16e448ca6d85ad66bd23fb598039b89acb6e8637562
132 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a download button to trick the user into downloading a malicious file, likely a game hack or application. It contains multiple embedded URLs pointing to suspicious domains, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

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-account-game-hack
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-links-free-spins_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/what-is-robux_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/moonactive-free-spins-2021_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-get-1-million-robux-on-roblox-for-free_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/minecraft-free-version-pc_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/royale-high-roblox-hacks_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id/repository/coin-master-free-attack_GM406889139.pdf
    • http://etd.ilmukomunikasi.fisip.ulm.ac.id//repository/ro-ghoul-script_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031dd2.bin
6c4fbc26dab837b85091798e2e191a0c073ab02f210735658e777a74fbb59906		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DD2 25576 bytes
font_01_sfnt_off000359d0.bin
eb2eb7e6ed71f77c327fc61cb094d80bf0a8a760e777cfd3a9458c26f0382535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x359D0 18604 bytes

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