Malicious PDF — malware analysis report

Static analysis result for SHA-256 80890596d0d2be02…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 04:27:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a64992870d4bbd88019e462fe6de3786 SHA-1: dbc54f9703aeaee4dcc6f52c8f9330fd388f8677 SHA-256: 80890596d0d2be025d21b536bb7c5fc90e832e1479b51b444604a611f20e7491
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents, suggesting a link farm or content aggregation strategy. The presence of a download button lure and the ML classifier's high confidence score indicate malicious intent. The primary URL http://netcdn.tw/app/479516143/is-minecraft-java-edition-free-game-hack likely serves as the initial landing page for a malicious download or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/is-minecraft-java-edition-free-game-hack PDF link annotation
    • https://alisa.com.tw/upload/files/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-boxing-simulator-2-hack-xbox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/cheat-roblox-traversed-wall_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-hack-the-northern-frontier-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/bbg-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-virus-free_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/funny-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/go-to-this-website-for-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D84 22516 bytes
SHA-256: f0fdca8601e24df0aaeabd13aa60a7bf529e7652c197bb83e3b74b62e66544d1
font_01_sfnt_off00005f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9B 18452 bytes
SHA-256: 31a4a06d9fb355d17720bdbd4e924d787a36c109291985566279346bb5d94ffc

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