Malicious PDF — malware analysis report

Static analysis result for SHA-256 66de52b3a2ed036e…

MALICIOUS

PDF

38.9 KB Created: 2021-05-23 12:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 84bef5d55d5845d96be5169be9d85efa SHA-1: 839847fd49aff16d291e572a8cfc1f18cd681d62 SHA-256: 66de52b3a2ed036ee116bdf55262195626ff830626db2b1bc31fc1135b50a8e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body explicitly mentions 'Claim Free Robux' and provides a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call-to-action, reinforcing the phishing attempt. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/claim-free-robux-game-hack In PDF document text
    • http://tckontrola.hr/files/roblox-pics_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://wolfzscriptsIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002eda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EDA 25976 bytes
SHA-256: 803896c0090f86fa395001a7bce0650186e2ba42799baab769204c45800c2d13
font_01_sfnt_off00006bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB7 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7568 18696 bytes
SHA-256: 5cf9f9319346d61d0cee7eea738a99b5b91b4687cc89c43f6f5509699f250cff

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