Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe6dc5ff3e6a89d8…

MALICIOUS

PDF

40.8 KB Created: 2021-04-29 06:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4fdb397404a833aa8aafd625ceb6663 SHA-1: c8ac1644ad532bff1fd8541d5b66658022831279 SHA-256: fe6dc5ff3e6a89d896f18b505798962230e0741f9689e77976af412e60d6bc0d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely leads to a further malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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/cbro-hacks-roblox-2021-game-hack PDF link annotation
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/descargar-roblox-hackeado-adopt-me-2021.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/roblox-accs-free.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/robuxian-youtube-page-secret-claim-free-robux-robuxianyoutube.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/roblox-shinobi-life-free-spins.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/hack-all-tycoon-roblox.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/cheat-roblox-lumber-tycoon-2-uang.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/comment-cre-un-free-admin-sur-roblox.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/free-coloring-pictures-for-roblox.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-roblox-2021-on-computer.pdfIn PDF document text
    • http://www.elearning.mtsn2ska.sch.id/__statics/gudangsoal/files/roblox-skywars-how-to-get-free-vip.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
stream_003_off00004366.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4366 25680 bytes
SHA-256: da3b64a672955483bed44b6daf9f253592df3a567c3348f78e59419e1dea9d7e
font_01_sfnt_off00007cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBA 18584 bytes
SHA-256: f5eb1781fc7adeefd829bb5fba86be4cc2e6760a067e0c2294efb9134b274fb7

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