Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e68f6b9d72cc52b…

MALICIOUS

PDF

89.4 KB Created: 2021-08-14 21:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 211c7c1fdd7196c13e1ed7949a0e8078 SHA-1: e8fde14c06b8ef9bd84ee21798daaff034aec061 SHA-256: 2e68f6b9d72cc52b1203909d1513cfbb3f773c87ee42289d2b5e9500a8340f0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of multiple external URIs and the 'link farm' heuristics strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=%C2%BFcu%C3%A1les+son+los+s%C3%ADntomas+de+infeccion+en+la+prostata PDF link annotation
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089838473b61---71344381345.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/xuwakuzafilorazogu.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/73454030619.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/lufanodivelivuvenekis.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/73918980530.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/jevunidodesaso.pdfIn PDF document text
    • https://suksesunited.com/contents//files/77435913526.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/79606225433.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/bf74923d17d3918c8eae5392b3eeef98/83114516051.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/62267623390.pdfIn PDF document text
    • http://pensiuneavalentina.ro/app/webroot/file/natugepomibu.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/76386058355.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/sokoworosevazawofixobakef.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/natomanip.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160747759447e8---380370147.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/1inm9gierob4n3gksqg44v9cbr/manitafujivivifop.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/nasisakuxuseloji.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/lolununiliropisogopemuxor.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8e7c54577e75a4cd9c706efbb1a0aa75/woworib.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e54988c0---lutitefenagugekab.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/bbptpi2q504s2saltk6p92ato1/motopusimozukunegiro.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/gunavogutunisadezumijipo.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/2a12b7gos61j9ncph2m43s0ugu/43634793955.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/996ebb97c0051aaf92988e5e26294935/2089652494.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_off0000f617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF617 17564 bytes
SHA-256: b3faff27df54598382e372fa3af4da4cc4819753299cfee2672509cd9ae873ce
font_01_sfnt_off000122cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CD 11176 bytes
SHA-256: 61e5035ae99779157ac4a8002a84720015ebb9bfb07b85f2b2bf923529cb8cf5
font_02_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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