Malicious PDF — malware analysis report

Static analysis result for SHA-256 113255f17447f48e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 23:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7eb33bf61c53e69d370fe04cadfd3140 SHA-1: 8ea62d01ea45da018cd202be7b453678d51796a8 SHA-256: 113255f17447f48e27abd039d7efe8988d39c24bc9fde94a818da90da5170d57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and further malicious PDFs, masquerading as game hacks and free currency generators. The primary lure is 'Minecraft Windows 10 Free Code', directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to known malicious redirector infrastructure.

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.tw/app/479516143/minecraft-windows-10-free-code-game-hack In PDF document text
    • http://librarysenior.com/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/discord-servers-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-free-robux-extension_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/cheats-infinte-jump-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/cheat-roblox-2021-la-dernier-misajoure_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-and-coins-on-coin-master_GM406889139.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_off00002ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA5 22272 bytes
SHA-256: c58e59583ca12481865b05c0ad293c721781808d9084456214d4e13fc476a771
font_01_sfnt_off00006016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6016 18812 bytes
SHA-256: 64384bfcc58c1bbdf03ee3f883a0be16d7cce96ae7e77f1df9d799b764379cfd

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