Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46607efdb71214c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-11 13:06:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f80bfd8dd7cc6c1fdec76bdb12c9fff1 SHA-1: d154d3c9ab13aae2107b482baa316949cf77154f SHA-256: c46607efdb71214c17cfc6b406e40cb4a853114c67a1e2e22a5f0c774535e1c0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 https://netcdn.xyz/app/431946152/free-executor-roblox-game-hack PDF link annotation
    • https://www.jjpremiers.com/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-hackers-list_GM431946152.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_003_off00004a10.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A10 25212 bytes
SHA-256: 8af150b6c847ea8b00a5fcfc5f64cb97b8e8da27beb735a652483d5dc9ef6c73
font_01_sfnt_off00008453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8453 18192 bytes
SHA-256: 76421a682e25ddc3073895da10e5f06be723ab9914bfc49cca563022476f5c91

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