Malicious PDF — malware analysis report

Static analysis result for SHA-256 114b5bd6f7c16af6…

MALICIOUS

PDF

42.2 KB Created: 2021-05-13 21:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b43463793af22c85465c86b34e962441 SHA-1: 2aa7d0a5d9a7d90371383342060c1005b679b7f5 SHA-256: 114b5bd6f7c16af68f899c84bdf5afdab2cc49d3720dbdf3f7d79fe3060593b1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of embedded links, many of which point to other PDF files hosted on `vieclamjapan.com`. These linked PDFs appear to be SEO-optimized content related to game hacks and free in-game currency, suggesting a link farm designed to attract users searching for such terms. The primary URL `https://netcdn.xyz/app/431946152/roblox-account-taker-game-hack` further indicates a malicious intent to distribute potentially harmful files disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/roblox-account-taker-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-2021-no-human-verification_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
stream_003_off00004997.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4997 24964 bytes
SHA-256: 02783d52a314c9e860fa6972a29f889773bdb2cf011d15acf913c1efe450a413
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 18428 bytes
SHA-256: a45c208a7567f3e6804dce25d11280ac896a92182563dc04cbc3a4f5e023aa05

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