Malicious PDF — malware analysis report

Static analysis result for SHA-256 62996e6868e8187b…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 19:24:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b4770e4c4f292dd296ad7bce8c8084e SHA-1: ada7ef8f32b4db9203e1c60761ad9319abee57e0 SHA-256: 62996e6868e8187b9f91fd330a3f1ab0236f602fdaa60a93c0bd71e0f3197b99
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to external sites, masquerading as generators for game hacks and free currency. The primary malicious URL, http://netcdn.co/app/431946152/how-to-hack-something-into-your-roblox-inventory-game-hack, is identified as a redirector, likely leading to further malicious content or phishing pages. The extensive link farm suggests a tactic to increase visibility and traffic to these deceptive sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-hack-something-into-your-roblox-inventory-game-hack In PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/course-obstacle-2021-roblox-cheat-code_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/rbxfree-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-dll-scrips-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-youthnow_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_off00002c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6C 22660 bytes
SHA-256: f9c96c0453c8722e4a2f6c535793f7e3166d4bc55140a175cd235c4db7ff9d12
font_01_sfnt_off00005f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 20064 bytes
SHA-256: 4e13012509a91c115e0162e90bd63eb6a75ac9ce455bda8806f101504c3b4e67

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