Malicious PDF — malware analysis report

Static analysis result for SHA-256 8199ce411cf041d5…

MALICIOUS

PDF

226.7 KB Created: 2021-07-06 03:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe3c4042666dd650bc025818c27adc04 SHA-1: 4b2053bc3b458873e302a5e470250d820acc4232 SHA-256: 8199ce411cf041d53a393bb8df1269c45a747a95bd43809e5a948e2268ab1197
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, aiming to trick the user into installing a browser extension or plugin. The embedded URL, http://netcdn.tw/app/1094591345/pokemon-go-free-stardust-game-hack, likely serves as the initial landing page for this social engineering attempt. The presence of multiple game-related lures suggests a broad phishing campaign.

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-stardust-game-hack
    • http://perpus.stfm.ac.id/repository/roblox-v3rmillion-khol-admin-hack_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdf
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/roblox-free-premium-method-v3rm_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/hack-roblox-accounts-2021_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/flip-master-free-coins_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/bruteforcing-for-free-roblox_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/free-robux-survey_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/free-roblox-codes-no-human-verification_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/free-minecraft-capes_GM479516143.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-cheat-codes_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/roblox-flee-the-facility-hack-script_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/roblox-athoi-admin-hack-2021_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/how-to-get-robux-for-free-and-easy_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/coin-master-coin-hack_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031ee5.bin
514f08d6920ef8928bffb1b1300cd16a977dd232468bd05ea569c35f619abe37		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EE5 25576 bytes
font_01_sfnt_off00035ae8.bin
8dd74b7e760d3cf270763d12a927e7bd05597f59885d465d566922ba01eafede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35AE8 18776 bytes

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