Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e7cd6d2b727275…

MALICIOUS

PDF

33.0 KB Created: 2021-06-28 09:44:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91c47468f3e241f12bebeeb779a551b0 SHA-1: 440871f8a5abc808cb82c740bf4b8e20f2005db9 SHA-256: c0e7cd6d2b727275f9a42e2aed9b31a2a3535dd15eab9b41b6b83d7e2ebbb9ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent external URI pointing to a download site for 'free Robux'. The ML classifier strongly flagged this PDF as malicious, and the presence of download lures reinforces the intent to trick users into executing a secondary payload. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or social engineering attack.

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/free-robux-pc-game-hack In PDF document text
    • https://www.metal.hr/files/hack-mod-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-hack-apk-android_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://www.metal.hr/files/actual-hack-generator-roblox_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/alone-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.metal.hr/files/coin-master-free-2021-spin-link_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
font_00_sfnt_off00002d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D91 21504 bytes
SHA-256: f662d7513f942f312ca5ad8db7e5b2519a3f1b988dd1522a8b140a1e04984c90
font_01_sfnt_off00005ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA2 18868 bytes
SHA-256: 6482badab0eb3c937c8e12167f082030008ef6f9b587481ff4a4b186181700b0

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