Malicious PDF — malware analysis report

Static analysis result for SHA-256 3478ee441bdea13e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 06:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b78655cdb89903f85ee668882773c6d1 SHA-1: 2fa8ba1105d33ca6273653eedc1587e894c310bb SHA-256: 3478ee441bdea13e138fd5c51972544e034026ecbded8df726c42948bb138f7a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free currency for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. No scripts were extracted from this sample, but the numerous external links suggest a redirection chain designed to deliver a malicious payload or lead to a phishing site.

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/roblox-hack-generaort-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-items-on-roblox-names_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hacks-that-work_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/25-free-spins-coin-master_GM406889139.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_off00002fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE2 22296 bytes
SHA-256: f597d4fe6acd6e576053baf1ac4251816fc2f2b471863f1a4eee87feab8e3cdb
font_01_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 18760 bytes
SHA-256: b79899937f6f59d67c0cc016ae9e295c0b2eeda93cfd6b0750b290eebb9c7341

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