Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f72d61db268c1e0…

MALICIOUS

PDF

33.7 KB Created: 2021-06-26 09:50:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f7538c2accbd5fe210e6f8d504254f10 SHA-1: 9c839605578e51df0e89ee6ffc94910dc8f3acd5 SHA-256: 5f72d61db268c1e0f409b83cf75907d3ab2a3222a01104803f0510010db702c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, as indicated by the document body and critical heuristic firings. It contains multiple links to known malicious redirectors and other PDF files hosted on suspicious domains. The primary malicious URL identified is http://netcdn.co/app/431946152/youtube-how-to-hack-roblox-accounts-game-hack, which is associated with redirector infrastructure.

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/youtube-how-to-hack-roblox-accounts-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-robux-on-a-ipad_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/pubg-uc-yatrma-sitesi_GM1330123889.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-mod-menu-hack-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-song-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/delitive-mod-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-jesse-tc_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-coins-and-spins-link_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_off00002d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D12 22012 bytes
SHA-256: 7b056bac45e8044a5ecbfeeb01975f5eedb50123178e4a02bd3b16f4680dd00f
font_01_sfnt_off00005dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 19228 bytes
SHA-256: b6edb3681ef7ce522bbe1a16bd332488602d10af715991a2408ab2a0f44aadd0