Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cd5919309dbce3…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 05:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04ec609bcd6ae1e3ade81a2561223c0c SHA-1: d49e14e49429a8c4b6c5809c9b66536b883a8e6a SHA-256: 19cd5919309dbce323ff783165d260bc964fad36f7b49d8e3f2559444ea2fc39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering lure designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/free-spins-on-coin-master-2021-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/rape-simulator_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_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
stream_003_off0000493f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493F 26912 bytes
SHA-256: f1012501d6b37ede52abae93e6b57dbe29ab95b563cf8e6b37b04aa2eaec0a3d
font_01_sfnt_off00008644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 18288 bytes
SHA-256: e7fc04cebd192de8ea685c8f65a9790caba4d729d1f53b0455241ee170bde56f

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