Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e3b43525f80a12…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 03:12:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 093ed5dfb5291a8bcb96dba6cdc4b8fd SHA-1: e82a7e5fefd6bf0e62a64a319c0a5802dac05288 SHA-256: c8e3b43525f80a127cc6f48ef3e075ee619a174c40a05e1987e5cec5e2943b52
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for a game hack redirect lure, indicating a phishing or scam attempt. The document body and URLs suggest the lure is related to obtaining free items or hacks for games like Roblox. While no scripts were explicitly extracted, the nature of the lure and the presence of embedded URLs strongly suggest the intent is to redirect the user to a malicious site for further exploitation or credential harvesting.

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/how-to-get-dinosaurs-for-free-on-roblox-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/hack-para-conseguir-robux-gratis_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-accounts-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/bloxburg-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-roblox-crazy-whatever-091_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-robux-legit-for-free-20217_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-apocalypse-rising-cheat-engine-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-pastebin-august-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-become-a-hacker-in-roblox-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-hack-tools_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_off000030d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D9 22576 bytes
SHA-256: 1143fb946a91b49e3eb16892a5977366cbbd9098a6054731ba35e1a30b29c6b9
font_01_sfnt_off0000636f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 19344 bytes
SHA-256: e39af03e45bc60ebd454ce944c53e3ea53395e220f40a1f3e934c209a7b4f2e8

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