Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3f5a996773c493…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 08:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b889d46e413f5a017f5f40aaa8d8b0f SHA-1: af0a334e117e890b20dd3a474a368e19bf7ebe6c SHA-256: 2f3f5a996773c493f43ff908c9346b369a6c9d5a0003132bf9d2e695a4056d8e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox and Minecraft. These links lead to further malicious PDFs hosted on domains like librarystkippgribl.com. The document body and heuristics indicate a lure-based attack designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-jailbreak-hack-client-download-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/is-tiktok-free-on-android_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pubg-uc-wholesale_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/give-free-robux_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_off00004dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD1 27248 bytes
SHA-256: 54133df7d0fbbb728f0d47874388a2cc728c9773f533290415ef645b3ce7099d
font_01_sfnt_off00008b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 19080 bytes
SHA-256: 92fe3ffcdcaf6c553749d5ab9dd6c9a10ff73301955d17a48e94f919bc67e6e0

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