Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b157ec96bd2340b…

MALICIOUS

PDF

47.2 KB Created: 2021-05-12 02:22:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a4d113878eece2e80f4c2ea4b59ff7d SHA-1: 036c6fe9920ee18be423ebe773c67022e19c5ea0 SHA-256: 9b157ec96bd2340b1df36bd28d595c44a6adb7fd553ecbd16ec1203c743847ce
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file exhibits characteristics of a malicious document designed to trick users into visiting scam-related websites. The presence of a "download button" lure and a large number of embedded external links pointing to other PDFs, many with SEO-optimized titles related to game hacks and virtual currency, strongly suggests a link farm or phishing attempt. The ML classifier also flagged this PDF as malicious with a high probability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-game-hack-version-download-game-hack
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/apps-to-get-minecraft-for-free_GM479516143.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/hack-coin-master-32-mod-apk_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-printable-roblox-images_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/roblox-skins-boy-free_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/rblx-city-free-robux_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/get-free-spins-link-in-coin-master_GM406889139.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/old-roblox-accounts-for-free_GM431946152.pdf
    • https://e-learning.man1boalemo.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004acb.bin
723bde1e450626b37bf02bda74303d77df19041d5c0e8cf28edeb753cc537b65		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACB 27896 bytes
font_01_sfnt_off00008af8.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF8 2840 bytes
font_02_sfnt_off000094aa.bin
bf7747fad6589835e27396875397848ee10c05064cdddbf89c0c768158d1b55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94AA 18692 bytes

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