Malicious PDF — malware analysis report

Static analysis result for SHA-256 2068cda2c283b378…

MALICIOUS

PDF

34.0 KB Created: 2021-07-07 15:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9660b9ff6d0857dd5c0352a13632592f SHA-1: 99fc6c55928e07561083448bc3f6ab355dcdf629 SHA-256: 2068cda2c283b37821344eb62ac920a802cb523c6cb15cc96ab2da2c03db249f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/claimrbx-free-robux-game-hack, is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attack, likely intended to lead users to scam websites or download further malicious content.

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.tw/app/431946152/claimrbx-free-robux-game-hack In PDF document text
    • https://cleansui-home.com.tw/image/data/files/get-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/assassin-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/pant-free-roblox-sharkblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-robux-hack-real_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/ho9w-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/in-which-country-pubg-uc-is-cheapest_GM1330123889.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/his-girlfriend-cheated-on-him-in-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/scarf-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui-home.com.tw/image/data/files/coin-master-free-spins-link-blogspot_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_off00002e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4C 22128 bytes
SHA-256: de923595313fdfca4fcd5311c01c7c2e69ff224f5e20cdc81e60a3d3d1f6706e
font_01_sfnt_off00005f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 19168 bytes
SHA-256: 7bf764ce28968fdb785bb336023e4079e63a9f6de2364164f85b44d41da13fd4

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