Malicious PDF — malware analysis report

Static analysis result for SHA-256 a863cca019c2b023…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 01:00:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 066862c9365e98c87adfe58eb1720be1 SHA-1: c8d32b27d950f0f237d28a4a583e92ef07755948 SHA-256: a863cca019c2b02364a6f8d025925dbf6506cc8eff4427c04cd75035164263f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Robux and Coin Master spins. One of these links, http://netcdn.co/app/431946152/glitch-things-that-give-you-free-robux-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a lure for potentially malicious content, likely leading to malware download or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/glitch-things-that-give-you-free-robux-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/working-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-accounts-lost-pin_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-windows-10-code-free_GM479516143.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/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-generator-bc-only_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002d2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2C 22116 bytes
SHA-256: 45a9c82ade0efbe85e01519983827c198dd1f65466f45c465880bba076048740
font_01_sfnt_off00005e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 19456 bytes
SHA-256: 56779e16371014a537b200582c5acfb360aae510f0cfaae7762eb539c2e0f0c4

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