Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87bee1fa6ad86eb…

MALICIOUS

PDF

35.1 KB Created: 2021-06-18 10:56:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a68941af43148e53b40b1bdb5dc3144 SHA-1: 343f367c5e56ecbe94a517e02f7db17893333284 SHA-256: b87bee1fa6ad86eb85d2f40caf19cacab7ca0bff973e8cdac2c9992bce6d0975
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and embedded text promoting 'robux generators' and 'game hacks', directly linking to malicious redirector infrastructure. The document body and heuristics indicate a lure designed to trick users into visiting these sites, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the malicious 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/robux-generator-no-pasword-no-hack-game-hack In PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/20210-robux_GM431946152.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/tiktok-free-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://elearningman2jember.com/__statics/gudangsoal/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_off000032df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DF 22044 bytes
SHA-256: e95cbce1f92b74c211ab0e951f8116f77b5e601776eebb1f9eafb929c2c386ee
font_01_sfnt_off000063a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A0 19132 bytes
SHA-256: f340e7fcc47b4d786a7f3140569fe95cf6ed39e7c1ab49d1fca246d3b8398ea3

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