Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bd021841986e83…

MALICIOUS

PDF

86.9 KB Created: 2021-08-30 08:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a32f132b46f58d4117e59d8f48dfc45 SHA-1: a281598709313d419981687143fe44a25c3d91d7 SHA-256: 23bd021841986e83e889f69750ad1c0d23f76347334ae236d2bf7e01b5f68862
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to domains that are either compromised or appear to be disposable, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, with the URLs likely serving as lures to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/54575805057.pdf In PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/98592458229.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/ramowudiwuzenoxodasezaz.pdfIn PDF document text
    • http://canadianrockies.info/files/file/donokezi.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/kusoruvovuxu.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/cf6df724c5c1ecfe7a62962df1d718fb/domaxax.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/pufusowumazogodiralilo.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/fuxikabugoso.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d45c8d76d---zevowezadipibamoni.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/linugi.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deb1634beb---gakujafaru.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b04bd4f033---januxokatifupapiwikupen.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/7cbb6c244c401aca2e2cb8e089dc007f/foxatusukiwuda.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/21005165319.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e4796a0b13ac6ef1ee30c9ad46cb8692/kixazenijufamubege.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/573497110f5480fff537b69b3d5658fe/67617634510.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16079b10ee8fb9---85195576714.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/9c85c738ccabdc15c48c2f823833b73b/71833831745.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/89134076870.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16098545d4f6c6---60735133137.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/marivumigozimig.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e2e5f86576a7d45c77dd96c7eeae5504/4335847937.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/venujafali.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/nipobubube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=the+five+principles+of+designPDF 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_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 17604 bytes
SHA-256: 5f05bf2fdb71dbfa26e87e55dca3d1ebfc6ae461a27e25c89819707c316d0075
font_01_sfnt_off00011ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA3 10668 bytes
SHA-256: d6fe73d664623999f1b55df23a24552a314d57a5501117da52402063ae5a62fe
font_02_sfnt_off000134cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.