Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e7a3e53f63ea5c…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 13:23:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 650282a59ddbb72936c92b33c3a870a4 SHA-1: 4edd907dc384e3b865d66784efd8cf50565da4f7 SHA-256: 71e7a3e53f63ea5c5ad535f1a72cbe92f70093104a674374882e7023832d965b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency, directing users to a malicious redirector. The document contains numerous links to external sites, many of which are also PDFs, suggesting a chain of redirects or downloads. The primary malicious URL identified is http://netcdn.co/app/431946152/how-to-do-script-hacks-on-roblox-game-hack, which is flagged as a known malicious redirector.

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/how-to-do-script-hacks-on-roblox-game-hack In PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-ipad-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-robux-maniac_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/hacked-shirts-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/flame-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-minecraft-skins-ps4_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_off00002f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4B 22404 bytes
SHA-256: 3a65957450a9cd75a2346b1da3ed71f659dbaee1204c25aaf5e256cb506653f8
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 19388 bytes
SHA-256: eae1509a74a43125fbc700a84de782ff9f0c4ae2955bc03f6d6e0096f60e5edc

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