Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4bf454b75cb0d3…

MALICIOUS

PDF

89.8 KB Created: 2021-09-03 01:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0324b2586f60675cb001be89a17c14ec SHA-1: e7394f8e4bb0e5cc1a3907f4ad29ae7bfa1f96e7 SHA-256: ce4bf454b75cb0d3873cca0c0f1aad46c5f9e50ef9323627300f29f25d8ce634
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The document contains numerous URLs pointing to various domains, many of which are identified as link farms on disposable or compromised hosting. The presence of 'utm_term' parameters suggests a phishing or SEO poisoning attempt to lure users to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://irlanc.ru/uplcv?utm_term=odontologia+pediatrica+sidney+finn+pdf PDF link annotation
    • http://ruresept.ru/files/file/xudarowikijupali.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/16235927469.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16111ce41e8258---gesixaju.pdfIn PDF document text
    • https://topupdana.com/contents//files/61065459141.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/vomodumivos.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/razobuzesosof.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/44147070960.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2ff62fe4f26f626a66a083849ae6dbe8/juden.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/gavozebivawa.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/81502690896.pdfIn PDF document text
    • https://mfdesign.hu/files/file/83363741088.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b99ab8e1d2b---bodakamag.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/wenaxiteg.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/bajodedubajumit.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/79136384488.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210609123124317824.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/faxalirabezur.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/t3srgt6cj6qnt4e55750nq58nd/41557416618.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/kudukinurafigebubujafaro.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c401aa1d804---wubofabanesajuwafus.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1ea9881ca---fuwufeg.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/sibugigufularunikigubux.pdfIn PDF document text
    • 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_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 18812 bytes
SHA-256: 5f58b0d790b95ab54c5d0e6bcc738221ce7591b9ca8a6c966c13419ec84e0434
font_01_sfnt_off0001282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 10936 bytes
SHA-256: 66186a953f4a13911512eca5af745265bba4869d222ef66aa74f8de1d7cf0e88
font_02_sfnt_off00014177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14177 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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