Malicious PDF — malware analysis report

Static analysis result for SHA-256 425478fbd8810944…

MALICIOUS

PDF

36.3 KB Created: 2021-07-09 06:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 33b6b9f2fc79a9310f64e2541aea5663 SHA-1: 4ceba95345ae7a196390f242440e4b1c197f2803 SHA-256: 425478fbd88109441eb112f8c0643bcaf6b83c4d5c7a039975a3f4c46d5670f4
180 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-on-phone-2021-game-hack In PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-vip-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox-hack-client-free-download_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox-free-robux-apk-download_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/hack-codes-for-roblox-rb-wolrd-2_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-2021_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_off00003553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3553 22340 bytes
SHA-256: d54a8c0e719e7e0e097193744bb10a3de233da9b91b1ddc35bd13ec02f68616d
font_01_sfnt_off000066bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BC 19788 bytes
SHA-256: e48b3e34ff3a21a02db51fef543f00df2e8cbdbd7d9ff5be73dc5f5f5eb1ae47