Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fec228b873a83f…

MALICIOUS

PDF

33.7 KB Created: 2021-06-26 00:11:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 59127ac90eec45804d8cb7288d6ab8a4 SHA-1: 033db74668836e2f87d5c92ecac47958c82b6303 SHA-256: e7fec228b873a83f4c6f3f8a6d8a0831987680a57e88c303e44f97c752df792b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The primary malicious URL identified is http://netcdn.co/app/431946152/cheat-engine-roblox-hack-client-game-hack, which is associated with a lure for game cheats. The presence of a 'download button' heuristic further supports the social engineering aspect of this lure.

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/cheat-engine-roblox-hack-client-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-koul-admin-cheats_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-redwood-prison-free-gamepass_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-friends-with-stevie-on-roblox-funny_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-hacks-veiculos-simulaor_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-heroes-online-hack-script_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-dem-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-transparent_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-explosion-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/get-free-robux-without-downloading-apps_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_off0000304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304C 21384 bytes
SHA-256: 4e214a26877f066bbe27d841e0df9ffcb015f4569ee9ef6f7622bf957bd35be9
font_01_sfnt_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 19044 bytes
SHA-256: 2d5c80b384800cdf4e2ccb41bbaf873832613b1013c6f268c532976eb9f57fcb

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