Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8acd416c153ef63…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 07:45:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f214a84af300209b16b9fc1a8cf02d43 SHA-1: 30bf63bf731d5f8a061a09a975020318f1ed51eb SHA-256: c8acd416c153ef638e48ac8ba721e7d9eac32f2ec6eb60d10dd73ef35ad45ecd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, masquerading as free game hacks and generators. The primary lure is a link to 'roblox-fashion-famous-download-free-game-hack', which redirects through netcdn.co. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites. The ML classifier also flagged this PDF with high confidence.

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/roblox-fashion-famous-download-free-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/como-recuperar-mi-cuenta-de-roblox-hackeada_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-hacked-remotes_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-do-you-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-can-i-hack-in-kingdom-life-in-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-card-codes-list_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-roblox-account-that-has-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/www-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/room-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robux-generator-hack-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-no-offer-real_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-hack-roblox-account-on-mobile-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-with-adblocker_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-free-daily-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/cool-roblox-avatar-free_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_off00003091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3091 22820 bytes
SHA-256: db4d0d322260f53a1030eaf17a5a7dfd1a0079dd2937402c41778803eee5ba2c
font_01_sfnt_off000063b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B5 19840 bytes
SHA-256: bba0e63166abbec54114e513df9d2152e32032a96a843cf9f02af364794ea47e

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