Malicious PDF — malware analysis report

Static analysis result for SHA-256 265b0ee7bec3a414…

MALICIOUS

PDF

34.0 KB Created: 2021-07-23 02:35:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1c3b65658ce49833d9d9549aaf36239a SHA-1: 30596fce39779e965efb93a513856901e66313e5 SHA-256: 265b0ee7bec3a414ed527fddbd95fbe3f5315a8e68e4806002e089a5783809d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure, specifically for 'free Robux'. The embedded URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-no-verification-game-hack, is likely the initial landing page for a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to trick users into navigating to a malicious site, potentially leading to credential theft or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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.tw/app/431946152/how-to-get-free-robux-no-verification-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-into-someones-roblox-account_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_off00002ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDE 22580 bytes
SHA-256: c95e95fdf0a72b7d6ce12ab952aac927be806b18104526ee8c5a1624f263ae5f
font_01_sfnt_off000060d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 18948 bytes
SHA-256: 9dcb646a4577617f23880fd9ce8a94083064c98cd4092779ba74cf00f9732304

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