Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2653abe47a1b85…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 13:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8b8cba5eb688bf8c14812126f89ac9dc SHA-1: 970dd4b2dc6e7b42f043fb0103d13a447a270175 SHA-256: fa2653abe47a1b8568a523544007d39f4827e21db78e4f25560e27d6485161e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed for SEO manipulation or to host malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af7c758f493---kixugedovefekodutuzoj.pdf In PDF document text
    • https://ultralloy.net/upload/files/62646691317.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/772970fcf22f9feada9062fb1008324a/13265503517.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/56688339335.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/giwutofatedofusu.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2012ae8c5---79460239370.pdfIn PDF document text
    • http://rs-entp.com/upload/file/dapovewowidiv.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee9ec19140---56326343595.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/a11af661cd90255d11b6c4d995c9405d/tadexatokinijemazomew.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/30725956687.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/49939707675.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef2408f99---zikozivetipuvifebofax.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c93fa0c1c7c---getesed.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210816/file/mojivus.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607479160a8f7---bogawomafadikam.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/26503579694.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/7173654785.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/24a34015c4a2b7b2012eb93d631989d0/69381807837.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102491ae7876---binopelima.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/dusudumozizapoxituzetola.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/7159109055.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/nazofomuj.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/bizenigafanolurogeka.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/josaxurazumonoboxuvux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=godot+engine+documentation+pdfPDF 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_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 18420 bytes
SHA-256: 9332350f950f69594b0c2dd3a5f9de1987a9ec3647223dfedb69298cab8388f4
font_01_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 10788 bytes
SHA-256: 86cf113de833cb0542b44d3a08daeef9313ec2a2a48694498774615dc7f10e93

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