Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c5a47e09c9ac77…

MALICIOUS

PDF

84.9 KB Created: 2021-08-16 14:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4a1df1aa96f752635f4c2ed343d72d06 SHA-1: a4febca0f2eb0ea0857e958459e29493d29d35ec SHA-256: 00c5a47e09c9ac779a3f8b7e9d16685fe8b761eb9582cdbeb2c60db6e2369a9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c815c8c4a7---91113669465.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f562159efcb052e8832a82b225121053/jemejuv.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/bonojurubufonamoke.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/db2db50b06b2fa456f9e9d02d924a73e/89313166969.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/zesiwiruxolanezorafetizu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/dac0da294106aa94ce9900a7774f926a/10854400235.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1628666144.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/27600977273.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/tumajuvujul.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/af9df20dc13ad215f9440a06b177c7ae/95660602377.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/82312490682.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/f434440b175abe63cb6569e05408491b/49273198182.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ff9a8df989f59987229aea1695dc6ea/39944679133.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/72635805249.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/kopepedareruw.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/damusapabasosimuj.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/podenagepubekev.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/32084182604.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/466018979.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/zakivowubepisupifeteminum.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/fd6f281cdb84133eaeb64553edbeb636/23592233010.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/d912n8h43io7vnctnei2n0pc2h/zuxiwunelekanewaxakudek.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/bufemipinogareba.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8726c5fb89fe3fe47860b264a108f203/vixekivawalewujaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=descargar+imagen+iso+de+windows+7+starter+32+bits+gratisPDF 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_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 18152 bytes
SHA-256: 167b23b489a58e4205414ec798c4b3c91e74295026fb78b9702b7aadfe72d68b
font_01_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 11236 bytes
SHA-256: 1cbf363a757e9a15c31ea3fbf33b8c5307fec3719fb3fd57e858e90f95856ef3
font_02_sfnt_off00012b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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