Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b299411019a933…

MALICIOUS

PDF

42.5 KB Created: 2021-05-13 20:59:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87e6edf02bac45042d81b2288b1af622 SHA-1: 6f91722203f32d74878b05c7ed20a6498ee86539 SHA-256: c7b299411019a933c4d10eeb51da3beb007aa29795ebbc1f491999869504560b
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a visual download button lure, strongly suggesting it is designed to trick users into downloading further malicious content. The ML classifier also flagged this PDF with high confidence. The primary URL, 'https://netcdn.xyz/app/431946152/i-need-robux-game-hack', appears to be the intended destination for the malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • 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/i-need-robux-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
  • 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/i-need-robux-game-hack In PDF document text
    • https://silvterie.com.br/images/ckfinder/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/mcpe-hacks_GM479516143.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/www-free-robux_GM431946152.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
stream_003_off000048e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E8 25992 bytes
SHA-256: 48531cad2ab50ab364344c260bbbb986c1535f4a0bb6bcdafee03ce30f550476
font_01_sfnt_off00008438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 18024 bytes
SHA-256: f1ec7b04fe7efc10da220c54b18b8286c95b0450e2bf9e35db279b0a74518d0c

Open this report in the interactive analyzer, or submit your own file for analysis.