Malicious PDF — malware analysis report

Static analysis result for SHA-256 029db879632868cd…

MALICIOUS

PDF

79.4 KB Created: 2021-09-07 10:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f275fc8d61b49380bdfbb304aabd75c5 SHA-1: 34d17a632cb2c3cfb78810c643f7b87a92178efa SHA-256: 029db879632868cdb2033c41b7bb5f90e8c61df8cdd25c38634ccab1a4ba4f9c
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to numerous external websites. Several of these links point to compromised CMS upload storage, indicating a potential for hosting malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://kovtec.pl/eurostyl/photos/file/sedew.pdf In PDF document text
    • https://kisikana.hr/userfiles/file/zuwileruragukuk.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/6c5b8c9d3ff4834713666609850c0c81/kaferudipovusexabalodoz.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/34225188703.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/babekawukorevezaba.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/99p11jrem754k0ogh2uf7b03d9/54795183049.pdfIn PDF document text
    • http://lcxcable.com/fckeditor/file/86633650220.pdfIn PDF document text
    • http://juha.be/_files/file/1619659435.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac193ae368d---19205814668.pdfIn PDF document text
    • http://euroinstytut.pl/galeria/file/ripegikojabutidosokize.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/vevefafojije.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/jipefimit.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/31694699774.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/fuzovirapogedirekutanut.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/gezurabalowemigem.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/513350aad9bca506a7fb925482120d69/93555258866.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/xijipagifodinexadinu.pdfIn PDF document text
    • https://krossi.ru/images/content/files/lepugapatavefis.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/lolesivuvarusuwododoxudet.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pldil96qagvcrm30ggtibsv3rn/muzewokojumo.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/017ba5e330c7f1c5c384571f73f186dc/kevopogojen.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076bfc43ac16---titosidokok.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160833d764af9f---tabuveli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=self+esteem+worksheets+for+ks3PDF 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_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 17516 bytes
SHA-256: 7f3966ce5e3b2e0c5052baee6eac25be2b4657aef33a022a8535f8018c8fe6b5
font_01_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 10544 bytes
SHA-256: a1a9ed1f979a2e41f1deb3b5593896205598c78f5e27d0a1806a03e2ed4d4913

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