Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68122ebd848e365…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 20:08:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 28d089c4d6960e1eb2818d9abc8c43ae SHA-1: ded138574694e6b7bfe1976c12a51fc7be3ed553 SHA-256: b68122ebd848e365de0dbea1f0039044c4ec853eb832820377e73521f7bcc726
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free robux' and game hacks. The heuristic firings indicate that the PDF is designed as a lure to a malicious redirector. While no scripts were extracted, the embedded URLs and the nature of the lures suggest an attempt to drive users to potentially malicious websites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/a-code-froom-free-robux-game-hack In PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/tiktok-free-website_GM835599320.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/pubg-700-site_GM1330123889.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.nelsonssales.com/media/storage/editor/files/can-i-download-minecraft-for-free_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
font_00_sfnt_off000030ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AE 21468 bytes
SHA-256: 4e31430ab0e84d99fb465d6a0b0006931d621b0539d3cf683ea161783a569c4c
font_01_sfnt_off00005fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 19152 bytes
SHA-256: 84e391b531cebfe2dead3766d526d5d9e1aa07c373998e3fcba15e21f5652671

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