Malicious PDF — malware analysis report

Static analysis result for SHA-256 236f4b875262965e…

MALICIOUS

PDF

50.4 KB Created: 2021-06-10 20:53:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 524450a3fc3f5491e98e66d19a7a926f SHA-1: 587b8a91caa87102b8b02bb9ad6fb40abd3697b1 SHA-256: 236f4b875262965ea9f3a35fda6768161a096c89af33347df9ad19fd1337fd8f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically promoting 'free Robux generators' and game hacks. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful websites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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.tw/app/431946152/free-robux-generator-2021-no-human-verification-or-survey-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-real-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-wh_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://wolfzscriptsIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F37 26484 bytes
SHA-256: 0823c061a351857b24964454ed6e07566c2a672eeba44948e602830cba999323
font_01_sfnt_off00008a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000093ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FF 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off00009e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0F 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

Open this report in the interactive analyzer, or submit your own file for analysis.