Malicious PDF — malware analysis report

Static analysis result for SHA-256 211303e6dc88d289…

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 21:09:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f25869cd0284c33cfc31f562e52a3103 SHA-1: 2b54c9f8afa6756c3e5a3d3386dc3ce731521e5f SHA-256: 211303e6dc88d289b4c0f7164fafaf2991b396df1e524ef6ad5abf352dcc0663
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/codes-to-get-free-robux-game-hack PDF link annotation
    • https://www.fishboat.hr/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/robux-boost_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/pubg-uc-hack-online_GM1330123889.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/com-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://robuxhaxs.comIn 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
stream_003_off000046dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DC 25388 bytes
SHA-256: 46be69fdff5ba98a9b9ad8272c6f62eee67e5064ef937f9880bc0e0aef6ad3b4
font_01_sfnt_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 18292 bytes
SHA-256: c4e16f213ba515826b0fc8bd2adb9a42249615e2a7fe5232f5ebe2d4ec6172c1