Malicious PDF — malware analysis report

Static analysis result for SHA-256 c699b5eb2e423582…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 22:05:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0d9334cd91486c401a7c49ec43d8b84f SHA-1: d1a4d92aebe0eddc554010daa5f4548f9a52a421 SHA-256: c699b5eb2e4235821b6380e21c3dc82589a2a1e2e2b32d80b49c570a9b4163ab
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document contains a lure for free content, specifically mentioning 'free movies' and 'game hack', which redirects to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document structure and embedded links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/835599320/what-tiktok-free-movies-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-storage-upgrade_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-survival-hacks_GM479516143.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_004_off00005825.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5825 24152 bytes
SHA-256: 206b0c088a16829b0b8732e908f0c1f53ca259f4e6ff75567d9bcb9ea1edb6de
font_01_sfnt_off00008f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0E 18360 bytes
SHA-256: 2585aed373c6ea19030c295ea8ea58e010778e01ad6a96ca33479f64a7a2b619

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