Malicious PDF — malware analysis report

Static analysis result for SHA-256 31785a9d40e2e647…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 08:56:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 81b77a216083bd6a8e7f0093c0ff69f2 SHA-1: f9946d75340d6be752dd285df491910cb06c2024 SHA-256: 31785a9d40e2e647c750f26a90631db77cee3adc66c4ada7bae393bd23c2b72c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free Robux' and game hacks to entice users into clicking embedded links. These links, such as http://netcdn.co/app/431946152/free-robux-gift-catd-codes-list-game-hack, redirect to external sites that are likely part of a phishing or malware distribution chain. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure and redirection behavior.

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/free-robux-gift-catd-codes-list-game-hack PDF link annotation
    • http://suaedy-library.net/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-hack-tool-no-download_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-hack-sahrbite_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-accounts-with-robux_GM431946152.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
font_00_sfnt_off00002ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF5 22452 bytes
SHA-256: d818b629958b78788179c86dcdbc5f1b8f9b47ee07eaff1f2148dd50b260cdb5
font_01_sfnt_off00006128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 19112 bytes
SHA-256: a9b7dd84bf9e82aea66064645c2f0ef7c8831366a8baade96afcbb6aebc803c0

Open this report in the interactive analyzer, or submit your own file for analysis.