Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b43b52c107ecff…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 04:08:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66c262bf8b102dfade91f9ac0f00c05e SHA-1: d11ed00c1a5617e75cecd82f40e4e3694964e0d5 SHA-256: b3b43b52c107ecff1c33401c8d83f9b2e5172a8f5887ec7c7aa47a6f55c6a7a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed as lures for 'free generators' or 'game hacks', redirecting to malicious infrastructure. The primary redirector URL is https://netcdn.xyz/app/406889139/free-coin-master-gift-link-game-hack. The document body, though partially corrupted, also contains this URL and other similar links, suggesting an attempt to drive traffic to potentially malicious sites for financial scams or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9694

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-coin-master-gift-link-game-hack In PDF document text
    • https://cintasoeste.com.ar/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/roblox-download_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://cintasoeste.com.ar/images/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000043b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43B9 24108 bytes
SHA-256: 03dbddfb791cca6e052c09d8bc41c8df52821d5a6a6b1aa6b1e94bae13c24cea
font_01_sfnt_off00007aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000084b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 17880 bytes
SHA-256: 1ab37f68d76bb6673fe7e3ee425fbe9bd5389a518523b888c567f62bdf1aff93

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