Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b67ee9a6ab0dc40…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 17:35:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c0bdddf15620e240da5a6eb91f350362 SHA-1: f51ef7c5741b7afa2ba84de68983456de8181397 SHA-256: 2b67ee9a6ab0dc409d56bd5fded811629f77c3cbdbbd9abfbfd796487271066f
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to other PDF files, many of which are related to game hacks and cheats. One of the primary links directs to a URL hosted on netcdn.xyz, which is likely a malicious download. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to distribute further malicious content.

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/kachifpro-game-hack
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/what-is-robux-in-roblox_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-game-for-pc-free-download_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-hack-download_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/info-roblox-com-robux_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/free-account-roblox-2021_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/http-coin-master-hack-club_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/actual-free-robux_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-download_GM406889139.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdf
    • http://www.kbmmtsn1kabserang.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b35.bin
561603a2cc5cddb4efe70e9ec35d4e405d1ad11b2c8a25c78b2468f1e0f77100		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B35 24448 bytes
font_01_sfnt_off000082bc.bin
f5f16e9fe06415f99f9f196ec79e922628d3dac9c37f6a7894d79eeb781dffd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BC 17784 bytes

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