Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc36446406b59a3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 02:49:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7353c4af98eb2377de947723a47f27be SHA-1: 086c1bcc437dae48f90a60e095c7bd48a86de3f3 SHA-256: 6cc36446406b59a3e96f295ac388658582bf3b4b36383315f0d1f7c6d26f0046
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting 'free Robux' or 'game hacks'. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or malware delivery.

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.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • http://www.vista-design.hr/files/hacks-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-big-paintball-hack-website_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/serverside-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-roblox-jailbreak-account_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-redeem-card-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-free-robux-by-doing-nothing_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-free-spins-link-haktuts_GM406889139.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
font_00_sfnt_off00002ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBC 22736 bytes
SHA-256: 859f72658b385a1f86c9f64cbc932bec0ccc39b025ce90b4827fef4882a60711
font_01_sfnt_off0000618e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618E 19604 bytes
SHA-256: 58b409e880d8c8c8f611c8851265b785a46b2984af904f55916f4ac6f211fe18

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