Malicious PDF — malware analysis report

Static analysis result for SHA-256 548b045830c439e1…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 05:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7f32ed9016853afdff123fc85cf412ca SHA-1: 9dec5ebf1c1998d4e878709a4326f487ad19a3db SHA-256: 548b045830c439e122090b827aff7c3c05ca699e3722de68948dd7c7ad2a2689
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to 'free generator / game hack' which redirects to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the lure suggest an attempt to trick users into downloading a malicious payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-com-free-draw-game-hack PDF link annotation
    • https://xhse.vn/public/upload/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-robux-codes-that-never-expire_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/a-free-robux-site_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/roblox-tablet-cheats_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/roblox-money-hacks-2021_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/where-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/how-to-get-free-robux-using-rblx-gg_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/roblox-shard-seekers-how-to-cheat-engine-shards_GM431946152.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://xhse.vn/public/upload/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FE 21992 bytes
SHA-256: 54457e0bedc2d2b400768610a7a6496bf435d9cb0643d017ce503e49d60c759a
font_01_sfnt_off000061c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 19240 bytes
SHA-256: 532cb0b2d58c7a04e152d11a9509000d4f0cb85ccda52b7df2c4b6688f40a357

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