Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c40eec30f4969b4…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 23:51:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6b1225d0788a8f62c33cf68581765dd2 SHA-1: 46f4ba6417d5a2ea272f74a50c9e2b835fa95b7e SHA-256: 1c40eec30f4969b476e3fd74ef84513da351cb291506faea9fea30830d61d536
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm designed to lure users with promises of free game-related content. It contains a large number of SEO-optimized links pointing to various PDF files, likely serving as a distribution point for malware or phishing content. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/479516143/free-minecraft-mods-for-xbox-one-game-hack
    • http://pustaka.minangkabau.unand.ac.id/repository/roblox-jailbreak-red-boy-hack_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/tiktok-free-2021-views_GM835599320.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-pc-free_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/actual-free-robux_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/minecraft-free-no-download_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-earn-robux_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-hack-com_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-hack-software-download_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://pustaka.minangkabau.unand.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005240.bin
712de954184de0903dd6ff9591711c9f1b70d164116260269be2328d67eb0ee9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5240 31904 bytes
font_01_sfnt_off000092f5.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F5 2840 bytes
font_02_sfnt_off00009ca8.bin
3034162bb212f750d30f3b083c49397834114f606ecb661b66a42b1e278b7a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA8 18480 bytes

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