Malicious PDF — malware analysis report

Static analysis result for SHA-256 1359a5533186e9c9…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 22:02:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 177b30a855455f906fe612dd076f06b7 SHA-1: 82d569ba6e4448b5e5402753c379b59b495b5f99 SHA-256: 1359a5533186e9c9e7ed8a0c2a65cbc6e90bd627ab4becce4632e90829c0cadf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9769

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.online/app/431946152/how-to-get-free-item-on-roblox-2021-and-2021-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-prices_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/best-free-catalog-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-avatar_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/earn-free-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
stream_004_off00004f4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4C 25880 bytes
SHA-256: 33d314ba7cb1bda0882b12dd1fce169fcf0983cf2a1bdab752272b5f0907698c
font_01_sfnt_off00008b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000953f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953F 19052 bytes
SHA-256: 5e302b9842a99bdd88c64eb5b7ba9f96403167e28b144ff0f72b64c8a927af68

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