Malicious PDF — malware analysis report

Static analysis result for SHA-256 931429951e5ec6c6…

MALICIOUS

PDF

46.1 KB Created: 2021-06-08 22:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bc5ea2b3dadcb844d460f6dd386d580c SHA-1: 2b52f831da25b644f186d58f4a6979d0204ebdad SHA-256: 931429951e5ec6c674da6f5afd10c2721d02caf90d558b33c80667be360fad9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to a malicious redirector, masquerading as a game hack generator. The primary redirector URL is https://netcdn.tw/app/431946152/delta-roblox-hack-buy-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/delta-roblox-hack-buy-game-hack In PDF document text
    • http://io24.com.ar/images/original-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/tiktok-free-ads_GM835599320.pdfIn PDF document text
    • http://io24.com.ar/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skin-free_GM431946152.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_off0000510d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510D 27572 bytes
SHA-256: 39047497201c127f5c629771e8beb73f67abfa3eb7c8f5badba8b53b9b4d8f5b
font_01_sfnt_off00008fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD7 18776 bytes
SHA-256: 87fa139c08adf71b1444c650e82ed777a37bcec2d317bf0874446d8e543b5302

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