Malicious PDF — malware analysis report

Static analysis result for SHA-256 c598e4977ee1beb7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 03:57:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 32920c6b2347dd457d09cf82f28c35f4 SHA-1: ff600c88fb7084038adb81f2c41e7529fd27668e SHA-256: c598e4977ee1beb722c81ad0884a7c9f2c9eceabad203f0e7324c90aadc5a423
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-website-game-hack. This URL is associated with a high-risk heuristic for game hack redirects, indicating a likely attempt to trick users into visiting a malicious site. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/how-to-get-free-robux-website-game-hack PDF link annotation
    • https://wenshan.com.tw/upload/files/android-1-roblox-hack_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-cool-skin-free_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-report-being-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/in-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/change-roblox-name-free_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/roblox-jailbreak-bigger-bag-for-free-script_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-get-free-stuff-on-roblox-mobile-2021_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-roblox-accounts-webbly_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/free-robux-apps-that-actually-work-quick-download_GM431946152.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://wenshan.com.tw/upload/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E52 22076 bytes
SHA-256: 1461ac0cc9f7f09dd2b7beb627420d3817e46be8569952ff888f7b6194ceb844
font_01_sfnt_off00005f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2B 19304 bytes
SHA-256: c93debd830b422eae21ec10a608c2d09d6fed7207bb4c45cee900aa0b721bbbd

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