Malicious PDF — malware analysis report

Static analysis result for SHA-256 d527330cff60fe45…

MALICIOUS

PDF

71.1 KB Created: 2021-09-25 17:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d5d419247e6c6066bfe814bda9559ef SHA-1: d220e8460e337f4070c720bc3a3d02e8ad0ae71c SHA-256: d527330cff60fe4539ff07ad971e7936ac41ea5cdfccb12a1b6b673f6f62ca6f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ichibaninfotech.com/ckfinder/userfiles/files/gajufawewezeleluguro.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/4rkhl4d9bb42qecjkh5b46a2s6/kexorotinabibagutopeb.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d330a6215e---vitovefot.pdf
    • http://pharmabiosolutions.com/filespath/files/20210912190157.pdf
    • http://www.slenderclub.cz/ckfinder/userfiles/files/66214447657.pdf
    • http://hamyarsanatco.com/ckfinder/userfiles/files/vewase.pdf
    • https://nangluongvada.com/uploads/files/mirowuvaxeko.pdf
    • https://bu8m3tas68s-b1.com/contents/files/rupugenewazawubodaded.pdf
    • http://hifitness.hu/userfiles/file/nilativanuxipapotumolev.pdf
    • http://jaluzipro.ru/public/userfiles/file/71836440296.pdf
    • http://songhakbbq.com/uploads/files/kijiwiradidebuz.pdf
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/semakunuzudus.pdf
    • https://fotofidelity.cz/userfiles/file/72301289442.pdf
    • https://samajsutra.com/userfiles/files/bigijovipavowaxi.pdf
    • http://hongdanhaudio.com/luutru/files/famupefa.pdf
    • http://studioghittigargnano.com/userfiles/files/62565252133.pdf
    • http://cartopack.be/Images/file/ribez.pdf
    • http://sro52.ru/uploads/files/lezajewopatoxunosiwezov.pdf
    • http://www.offshoreyachts.net/web_upload/editor/files/dusemuboposas.pdf
    • http://camelliafb.com/uploads/files/202109160505055994.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/9d0efe4472593142bd0c8d5f35d46c0e/18589269163.pdf
    • http://7m-shop.com/userfiles/file/bimarufojiliwipi.pdf
    • http://techscreening.com/userfiles/files/83703521541.pdf
    • https://needletherapy.eu/upload/file/80586205714.pdf
    • https://pastijptoto.com/contents/files/radivafunabotosipin.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=best+android+smartphone+review
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b29d.bin
31a37c83fad821bc7333b13c5f1337fe6250b870891741aa9d9fcb96be667273
pdf-font-stream PDF embedded font (sfnt) at offset 0xB29D 17012 bytes
font_01_sfnt_off0000de17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 16792 bytes
font_02_sfnt_off0000f62e.bin
ac04dac40f0c734acf9177477f1e0fea7487fe39c778c69109e2f1ae159a1c4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 10816 bytes