Malicious PDF — malware analysis report

Static analysis result for SHA-256 25294a765aa6dc1a…

MALICIOUS

PDF

74.1 KB Created: 2021-09-06 21:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f12fd68ab8cb58702edc43b6c493c2b SHA-1: 5b65a9a45b6730d66ecd60f9ac7b8912a9fd9792 SHA-256: 25294a765aa6dc1ac2958a7d5c215517f563befc18a9e722fc8df2d0a008ff4f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bs22l7499mqo80uuh5c1db850p/63631627473.pdf In PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9e8c5045f---70239293742.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/dd7ebe5a5e03a22d3193b9b661ea3ddd/90124935739.pdfIn PDF document text
    • https://zagi.hr/files/lukewulivopobujaxu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610337bf7e319---gawobemamekodejovij.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/1a2cd787f6c104d9527baafb05a33204/90616550673.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/libekorut.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/47269218431.pdfIn PDF document text
    • https://ewt.cz/res/file/97924077368.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210531061555.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/24721f1f4409e1d59b65f6fb3db208a6/87908099446.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/46067647295.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/61307794040.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074689093662---mopumusakujufuxoliwivo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094585384be5---fizeradetawozalojon.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/voliwexukokivuxef.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba3f1a2101---44306804263.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/otqesglu88k8m9osuc4tor2ffd/3904521240.pdfIn PDF document text
    • https://path.mn/userfiles/files/merifukiwepodiviwezuwan.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/18685318820.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160dba98ef222f---kataleragomenuwodet.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb882c6913---pagubasawamitokita.pdfIn PDF document text
    • https://angkagenap.com/contents//files/71066952760.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/28167143361.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bec4a544e37---39247827307.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=soil+formation+factors+and+processes+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_off0000c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 15856 bytes
SHA-256: fc77619a2264e380a057de84a09acf2e6267b8e0c720088563f6aab66809d59e
font_01_sfnt_off0000e9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10856 bytes
SHA-256: de69072d46e154a2e5dc689437375a3cc37fa90b13dccb113e5f49ea41b0a8cc