Malicious PDF — malware analysis report

Static analysis result for SHA-256 6956099615f1a229…

MALICIOUS

PDF

74.1 KB Created: 2021-09-09 18:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 64f4ee6d651e49d6992488ac7f72c889 SHA-1: d63043c2b13e484821ac728ea3ed3c2fbd2c0009 SHA-256: 6956099615f1a22998c498bb62bb81aefb4777393b8a58559851f0698464ced4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://cycling-software.com/files/file/betubawipu.pdf In PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/990be70f166d9baed1223530cf98ff41/wipuru.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/duzofijeteru.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134ee37eea92---pixavegu.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/xegozapakivusez.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161304606e853d---47952064191.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210905000610.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/wujidevatijarufurotejiz.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/41688809635.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/66231145681.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/25367095890.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/sitevururubojurafubenu.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/lezexetelodivewilifadij.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/57459638882.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/e6eddffe3ef5cf0d14bb18eef1102ee4/58099093118.pdfIn PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/vapevu.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/26604695215.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/dunevida.pdfIn PDF document text
    • https://renetravel.ro/images/files/bagux.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/82017562914.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/lubotumagopamowudabarivuv.pdfIn PDF document text
    • https://negaratoto.com/contents/files/bozesewi.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/gafogavokivifovi.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/76789300487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=morpheus+tv+on+firestick+2020PDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/rufexutajejawilalozi.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210909/16311307276540.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_off0000bff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF7 10860 bytes
SHA-256: ce9a181d1b0c95ef63d11d430835d0802b84dd2a8f29e8dc885c76524d2ddbbb
font_01_sfnt_off0000d91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91B 16104 bytes
SHA-256: 7ffcfe663b8e56ddf0c4af6760cd6ebab41ee2db381be9d80ab3811d2a888647
font_02_sfnt_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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