Malicious PDF — malware analysis report

Static analysis result for SHA-256 7feb0e44fa708498…

MALICIOUS

PDF

72.8 KB Created: 2021-06-11 05:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 93378ddaa383b4b325bc67ad0d651380 SHA-1: 4ae6373caac5df51500a93daf1308cf41d617e60 SHA-256: 7feb0e44fa708498a119b0509551108966ce4d9ba9c4154062f4de43fc777819
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely serving as a distribution point for phishing or malware. The heuristics indicate these links are often hosted on disposable or compromised CMS upload storage, suggesting an effort to obscure the true origin and purpose of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/uplcv?utm_term=css+define+font+face PDF link annotation
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609729c51a44c---luzememakak.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/813f69a66f6671195dc6a398f1e71d28/30846764859.pdfIn PDF document text
    • https://vestol.bg/files/file/sileki.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2682a0b6c---lonunuxusubasa.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/13987870190.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/4kqvnsecqe5ddobikj1boh48me/tutatupe.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607746c1a3b7a---lokosapabevovujigawoni.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/dukexefilufuzukivisataf.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/14808336212.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/05101d65378a3e487710c3efadd866df/dinutuk.pdfIn PDF document text
    • http://gabortech.comadmin/file/kowelul.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/fd1f9baee4daeebd8b1328f8df6e66e7/10999268251.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/19830787218.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/2963662811.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF24 4792 bytes
SHA-256: 1fb02d367b960bb32fb91a99c7fb22614a80e59daab632622737b5b049eb2b9a
font_01_sfnt_off0000ef84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF84 11912 bytes
SHA-256: 0d81835e50eca006eb500f1980480b1b753324b219228979d83bbbb2980c5e11

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