Malicious PDF — malware analysis report

Static analysis result for SHA-256 4193ceb3c671530c…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 17:24:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 962526b5a7df3a6dcef1b987636f8cb0 SHA-1: 98a96dabc4830740cd4850b0200dc37b25c39a28 SHA-256: 4193ceb3c671530c0213abe71ed5cd29e3b75f17040054d7fba7577acd807166
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, disguised as game hacks and free item generators. The primary lure is a link to 'free-shirts-on-roblox-2021-game-hack'. The document body and embedded URLs indicate a social engineering attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-shirts-on-roblox-2021-game-hack In PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-robux-by-doing-surveys_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-views-tiktok_GM835599320.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/cheats-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-rebux-hack_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-online-play-free_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/pubg-uc-load_GM1330123889.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/kid-caught-cheating-on-his-roblox-gf_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-roblox-card-codes-november-2021_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://upes.edu.sv/ckfinder/userfiles/files/free-robux-legit_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
font_00_sfnt_off00002e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8B 22028 bytes
SHA-256: f6e94f9e16b56365d3555bf4bc449285bbe2896c7ee5c6432a3483b9ec84469e
font_01_sfnt_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 19444 bytes
SHA-256: 993de9ad9b3b0d8ca915b2c877c750c2438e562f89bac23e26e929ac3ff9cfe2

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