Malicious PDF — malware analysis report

Static analysis result for SHA-256 669a0b75ea1d3f53…

MALICIOUS

PDF

48.0 KB Created: 2021-05-10 23:46:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b8ec2582564b474fcb411d6d23c94ce3 SHA-1: 1aaebf3dadc746ae62f5b6914df61bac0204c111 SHA-256: 669a0b75ea1d3f5311f2fe315f54c228456fa5ffc88ca94e1d593f18cd07d129
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing and 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 0.9013

Heuristics 6

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/boku-no-roblox-hack-game-hack.
  • 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/boku-no-roblox-hack-game-hack PDF link annotation
    • https://www.labdagatismk1pundong.com/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/spin-link_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/minecraft-gun-games-free_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/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.labdagatismk1pundong.com/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://labdagatismk1pundong.com/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C03 27140 bytes
SHA-256: d5ad11fff2c880e9b57d77c5bd0ae36f0efa3b6773a304a9c5defe2264e646e3
font_01_sfnt_off00008b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 4084 bytes
SHA-256: ea3f5d0787d3470c80ab44ade76a68ef50391f3fbb247ba61cdac06cae482a11
font_02_sfnt_off00009922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 18320 bytes
SHA-256: cd83af5ba5492d0d90d9a213d6c06333e9cd9f39d2b07ffbf91c7f3a8ed3d34e

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