Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30628929fd74dab…

MALICIOUS

PDF

109.2 KB Created: 2021-08-07 16:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b47afd2ab1381b92a316691714908a9 SHA-1: d43ee8fc6a3ba4b50f52992dc1c3f49c357e9d10 SHA-256: d30628929fd74dab47e90c38163a78b2c1268b2c802b6a90f9d5f6eee8a162fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm hosted on multiple compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous embedded URLs pointing to potentially compromised or disposable hosting services supports the classification as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9429

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://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/227610epp0nkdjp5m46j22us0v/bedijanaposotakutuwaxu.pdf In PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/772710ac5c92f5a9135e3bbb03c9c812/jisafelituvibepudi.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/7ccd04235007c74d76aa39e11d23c005/bubinedetud.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/et8pdppgfnhgcrnbvd7sqskgsj/83385666682.pdfIn PDF document text
    • http://byecook.com/ckupload/files/remozi.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/8l71j2qaa11hlerlgf09ligb7g/wimifogijap.pdfIn PDF document text
    • https://susta.vn/userfiles/file/nivuziwomarelunuwalape.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/rg9r2hkfstp3pcsjkmmqo5c1sp/8320956345.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/rufilorudifavodazina.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b9be93212---zilivefotonoxekilolekovex.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/99789128925.pdfIn PDF document text
    • https://eslms.com/userfiles/file/19387625198.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/nelimupobavavebag.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/gsivh901f1oalsfkstv8f86ib9/48282254016.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607debf15585c---nelexinagajonuruditokip.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/23807500944.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/j5163t1pbheupmi67kgu7c3n64/xepusejiligitaxogulu.pdfIn PDF document text
    • http://mahnomenalumni.com/clients/879209/File/44236789898.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d796c080bb---63296433243.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f390efc65ef---lavetubexuvirukegus.pdfIn PDF document text
    • http://fotobambagiotti.it/userfiles/files/ditexexugagofel.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/de179a1c979956f53eac5d903b5ae568/67779368184.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/95102519644.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/18b3332f84dc37ecf50579202d231f96/59703631620.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8d03e08be---6740018773.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/87504680654.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/guxozofomilobalizinu.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/lamumogumozomusupizoduda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=corazon+salvaje+cap%C3%ADtulo+58+completo+facebookPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012fc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12FC3 19276 bytes
SHA-256: c40a62cc5d1088fe494200c7e6a1ba5db733005851686e4cbd619cd901534e60
font_00_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 3664 bytes
SHA-256: 0591f598456a9c5ce9747cad75818b118a9fe8bdc79062de03bd3b5073ddccaa
font_01_sfnt_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 11572 bytes
SHA-256: af729ee51e316749f40115af7639dbce69ec95d4b818719285190e10d3cb54d0
font_03_sfnt_off00014f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1C 23980 bytes
SHA-256: 6b63b83bc905e1169c6fbd1288b92611009488a129a516bf193a035c17cb45d0
font_04_sfnt_off00018ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1