Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68b8e38b3197aaf…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 11:29:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 851f214e7883b74f4e167e62f41e4eaa SHA-1: 57a2001375d226bb3d7a6c5c9a58e14b6d3f0f5e SHA-256: d68b8e38b3197aafc18da42f4018a11e91f6b5dc896ffaf09f7c9032d1b0e50e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, identified as a link farm, that point to external resources. The primary URL, https://netcdn.xyz/app/406889139/coin-master-20-free-spins-link-2021-game-hack, and numerous others hosted on library.itekes-bali.ac.id, are designed to lure users with promises of free in-game items. While no scripts were explicitly extracted, the PDF structure and the ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

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/406889139/coin-master-20-free-spins-link-2021-game-hack
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-card-collection-link_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdf
    • http://library.itekes-bali.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/best-free-roblox-executor_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-studio-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://library.itekes-bali.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-free-robux_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://library.itekes-bali.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bae.bin
b2770c9228ee825c585fe3d2611b9d407c319e51eadc7ad9989b9246bc177e15		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAE 24160 bytes
font_01_sfnt_off000082df.bin
35e9eef518be4f04511f9d5e633727e818c13db9b20db0c4aee16f9ae872e854		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DF 18456 bytes

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