Malicious PDF — malware analysis report

Static analysis result for SHA-256 8759adad6a3d0bd6…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 06:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c9a02171114647a4d18dfc3ff22dbfb1 SHA-1: 44d345799116d340b371ca6754dd5e55ad2a22cf SHA-256: 8759adad6a3d0bd6dc8c76c2315fd16ef81705e16445a2089f2ce465bcbd5cb3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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 http://kyochonbuenapark.iorderfoods.com/uploads/files/vabewovuvagef.pdf In PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/poriwewepasigoxolamexoj.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4876cc3bb---wajewinesidisev.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/75498599650.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/j7tnbg1ku43q8u5bcjt5dgjtlc/xovovujat.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/zanosewo.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/tewiralopululopeji.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/34062089450.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4ecc7eeea---51872476734.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/sefekevujipevobapudofifaw.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/9bop9r2br2pd2aq29empa6gtv6/36407485357.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/94146733207.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/padidijipasudenox.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/087c748425831c8681bda7e8e8775016/78999872856.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/56299309278.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/wilirekarugamufodarikazo.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/56363637120.pdfIn PDF document text
    • http://machulski.com/public/file/gufofeterilatituro.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4369557aa---figivozoxus.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3dfc24355---60034735249.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/murogivetupowakupewivojax.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/4172789352.pdfIn PDF document text
    • https://steammining.com/userfiles/file/kevidisipumus.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/52946846030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+get+own+phone+number+in+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000affd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFD 10944 bytes
SHA-256: 0308050de2609ab7b47fa21bd5317321ab753c0f415eee655e1261a5c02cec50
font_01_sfnt_off0000c8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C3 14664 bytes
SHA-256: 2c3ab6ee8b0b236d8266f27aaf063eabc88190713fe93f6d03f706a94e41c0d7

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