Malicious PDF — malware analysis report

Static analysis result for SHA-256 90972cfeeff7067b…

MALICIOUS

PDF

82.0 KB Created: 2021-07-17 08:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f60a4f2c7585eec8def4aaa17ae603a0 SHA-1: 87f2302b7023f84f9381aa707f44fc9facc765e0 SHA-256: 90972cfeeff7067b59d45bc42bb53303ca20c7a1946e33a2ca95e3eceb74edbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://gz-theoutfit.com/UploadFiles/FCKeditor/20210706050747.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5bed7abe---74316871780.pdf
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/
    • http://studiospazioambiente.it/userfiles/files/70970382064.pdf
    • http://artechq8.com/beta/uploads/files/rojufezasanaluporomovin.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3cbdb8a5bb---vukagotegolenunimital.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/301ffed20df251929c4592623a8cc8a1/35669454667.pdf
    • https://transit-connection.com/userfiles/files/gutokupeludaxat.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807f0530478---18625434797.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed256bb344---suvafufagojelepezexu.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/brj69nq84jca64kckqfok5acvg/vupowewuj.pdf
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/usrg65dbdctu7t6a02d9sve536/92506959339.pdf
    • http://kingbikeonline.com/images/upload/File/14955897397.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/vbi7fqnka0danmjkjh8tefdnt2/85590137399.pdf
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/volebalixanugapa.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094d793e076c---35968466055.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/xotizuw.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecf726fffb---14247757516.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/9cbadbe5b88d387f92fec33fab074c0f/lamigisuvituzisaxadasuled.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f74932f15---9614977718.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/gqvpapf04pn5rvvc5lcv0mppv8/84698664392.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/c3aa0c1d71a861a964796386d90e8c1d/2377146038.pdf
    • https://biogenetixpharma.com/ci/userfiles/files/domuzejofeziwomebejitizuw.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1415e3441876e96a83ff6433d9c4247b/46168508402.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad47c904a33---lanubosuvujimijemij.pdf
    • http://www.irrv.org/uploads/files/gakesi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+many+protons+does+a+neon+atom+have
    • 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_off0000de7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 16792 bytes
font_01_sfnt_off0000f692.bin
140c4d96cba7ebf99e40cf9fb2c5ce256df1026de5dfe6d8c6257ec4b385ce20
pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 10776 bytes
font_02_sfnt_off00010f35.bin
d6c9f1c233ac88908b5466e9d356bd75b843dec626eb013c9df1d026dfa43ac3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F35 16660 bytes