Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cc42827f1f08df…

MALICIOUS

PDF

44.1 KB Created: 2021-05-19 21:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ddaa4e3adf594f6106f9b9dfc30d01ad SHA-1: 6a9526f742b089b4fd15182dbdc7634a89a3608a SHA-256: e4cc42827f1f08dff5bed803cb7610088b3ffa13b472cd44a9188bf1c8746d75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure for free game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/431946152/lazy-blocks-com-free-robux-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-lawsuit_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
font_00_sfnt_off000047c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C9 29708 bytes
SHA-256: 88b464967dbaa21ffe6e3c149e3b614eae811d4caa14bf79f9490a7b5004c64a
font_01_sfnt_off00008823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 19008 bytes
SHA-256: 34c8d34d38b90765c6e33941713304debcf78082891e10a16d595afa5c3321d4

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