Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdb26cfd7883cc6…

MALICIOUS

PDF

47.8 KB Created: 2021-05-13 01:09:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4d7e39ff6c97ef8a7ab638a1c614e79f SHA-1: 333bf9b169fd20eefbc3faa7b1079eec44dd0c4f SHA-256: 0cdb26cfd7883cc630a63e3309921f81d66fd856200ea25e11e89f9bf520e212
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a 'free generator / game hack' redirector. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution. The document body, though partially corrupted, contains references to game hacks and generators, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-hacks-list-game-hack PDF link annotation
    • http://gornjastubica.hr/files/no-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3C 24840 bytes
SHA-256: c5fb0a1853a8cf2f44960bc80d4fcf0fb096f44cf42f5f8530b1d5c96301e1b8
font_01_sfnt_off00008548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8548 3020 bytes
SHA-256: f1a29adcea636583330be8db4f6466410de551ac48576b9e1aa5c34e2d665a1f
font_02_sfnt_off00008f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9C 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off000099ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99AC 17740 bytes
SHA-256: c2e082955acc44a54c2cd6792e97aac33f079296fe9f17b7b430410190c0edcd

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