Malicious PDF — malware analysis report

Static analysis result for SHA-256 6360af9d6d7b8ecf…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 19:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6d465b81c3da436bd9d9600f3432312d SHA-1: 832bbe09ffe3b6a2fd52f23a537bd145a0f9d7db SHA-256: 6360af9d6d7b8ecfc3ecada6778ac97ae1bb693034a8d0d7c7756b464e6ee721
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to various domains, many of which are hosted on compromised or disposable infrastructure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using link farms for malicious purposes. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://stotex.rs/files/tiripaxuzijuseb.pdf In PDF document text
    • http://squash-fitness.cz/userfiles/file/53814410398.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/97647315920.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/15524982732.pdfIn PDF document text
    • https://bselink.com/userfiles/file/61023223832.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/suzijidoginepotakimi.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210916231558.pdfIn PDF document text
    • http://dlzj.net/upload/files/2021091519195979797.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/4922701488.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/85392981091.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/68475511649.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/67613397149.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/211055194.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467f645fe0f---65801523114.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/53v3fsannta6r7r3obudr8id8a/zubibu.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/94405873782.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/78644199812.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/tmbm85bhh3it1rs8khr24fch2g/peridawine.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/53408979166.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/dakumimumugu.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/63265775543.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/47543332613.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/wafumubebovodomuwij.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/10456208095.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/judirono.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/pimozoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+access+phone+files+on+pc+without+unlockingPDF 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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 10928 bytes
SHA-256: 20df3cba8eb71354b9493b6fafba378671cda94dcb310dbb884b3a05de4a43f9
font_01_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 18032 bytes
SHA-256: c2a58c79bacbd7fbf3c24e327103e44a881f5d4feef7d02e5e6989ff89a1ab82
font_02_sfnt_off0001264c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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