Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad20d0e379e26d9…

MALICIOUS

PDF

68.0 KB Created: 2021-06-14 21:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e4afcb1760d808c240df5fdf75144d9f SHA-1: ef71d5bad24d4af3ab1f0882ff0d362d7fa715fd SHA-256: 2ad20d0e379e26d95f5582a7fb84f6e88094a2b92ec9774698ed011bc4fc05d4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the structure and URLs are consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=hot+mature+granny+pics PDF link annotation
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9d3e115d7---banamajamodelesopi.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/98116015196.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0d6019784---ripevarep.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/loluwot.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/c4cc8a4c05cc7d13fc2cddc9adae57e6/nuxekugom.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/fevejurawavix.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/f226461734456c59fbbdbe9903537bcf/35621142445.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c387266bc---83075914471.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/23675820554.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b81a18fad4828a7348452a02f4a85be6/zulubu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/818fe2ba3db9d8f97fb13326b23ee312/2307111682.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/molabarejir.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160813de667f04---vewezat.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/devasixibojogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6C 5284 bytes
SHA-256: c9b7c9e7f95012a467144c254405ed62f99079b7684aaeda2caaedd87a151a6c
font_01_sfnt_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 10192 bytes
SHA-256: 5b41e70ac005baa7ea00c3498dca9b7f2ec08bdbf4cdec9891335c191c545383

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