Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b864c354039dfd7…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 05:36:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c6aa4a71433670e157385befcc366561 SHA-1: 6b6a8b4ad209771b437991bc4d94202e1b87392f SHA-256: 3b864c354039dfd759d4b64cdf96c06989556e0c21fc8e119ccfc22e926920ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free generators'. The primary malicious link identified is https://netcdn.tw/app/431946152/roblox-project-pokemon-hack-2021-game-hack. The document body, though heavily obfuscated, contains references to game hacks and a creation date consistent with such lures. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-project-pokemon-hack-2021-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-use-roblox-hack-menu_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-admin-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/pubg-uc-price_GM1330123889.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/script-cheat-roblox-mbot_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-download-pc-hack_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-and-tix-hack-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-gamepass-script-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/earn-robux-by-watching-ads_GM431946152.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_off00005067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5067 28116 bytes
SHA-256: 87191962d2886c9e8a5b6a9be828f9f093a7cacbde8c2daa62416aaca85c322c
font_01_sfnt_off00008fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAB 19288 bytes
SHA-256: b496f022c1bbdd09448bf2c30153a4db02b5560d4a5a002df94a20520ffedc8e

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