Malicious PDF — malware analysis report

Static analysis result for SHA-256 0925e66d2384af5c…

MALICIOUS

PDF

45.4 KB Created: 2021-05-12 04:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a2ac282936c9a145bbe950f0bc981ecf SHA-1: 7c5dd85eff2581645ac2a8d0a4dd0a62c43562bd SHA-256: 0925e66d2384af5cb4e7510b3b164f64fe993aa134676675896f889ecae9f1f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free Robux" and "game hacks" to lure victims. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/rbxoffers-earn-free-robux-game-hack In PDF document text
    • http://librarysenior.com//repository/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E8 25148 bytes
SHA-256: 8579f2a86277a3c21a23cf901dffd734a041c747295fab15f7fcd9e87bcd5e51
font_01_sfnt_off00008361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00008ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF4 18244 bytes
SHA-256: fa7b58e8bbd6048af1f0a6b5440a1dcdf7c9ae2c9f232fd911927377916bfdb1

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