Malicious PDF — malware analysis report

Static analysis result for SHA-256 90194e4a01abcc3a…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 05:45:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 74ece76a32ebf1dc4db5a5e8c02b518e SHA-1: 6645dc3df45750438735185053369cc2c3c2d3a1 SHA-256: 90194e4a01abcc3a8d5e56d89ae12c9bcdb1fbab28ecc5cea2973a1353df28a6
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 0.9865

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.online/app/431946152/free-robux-toy-codes-game-hack PDF link annotation
    • https://www.labdagatismk1pundong.com/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-spins_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
font_00_sfnt_off00004dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAC 25336 bytes
SHA-256: e50acaf897624ca799bfeec4957fe09db9b7c78bdd6fbf8bbd548312100ce026
font_01_sfnt_off000086b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B6 18368 bytes
SHA-256: ad9a51248a6185f94095e56e2357ca463b468cd397c194c79b62cbae5cc25960

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