Malicious PDF — malware analysis report

Static analysis result for SHA-256 947e41b7c126d5b6…

MALICIOUS

PDF

68.8 KB Created: 2020-12-18 11:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0d516a4981f880964993ab482d33764f SHA-1: d01dddb7e8f5ad1f96ca46c0682fb9b687c8a1d7 SHA-256: 947e41b7c126d5b680739c387dd1bf340e724860fa748be90212c74618ec8cb4
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of directing users to potentially harmful or spam-related websites. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's designed to lead users to phishing or other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=google+sites+intranet+design In PDF document text
    • https://tebakoreku.weebly.com/uploads/1/3/4/8/134866173/7cfa33c57c815.pdfIn PDF document text
    • https://jelopujepifo.weebly.com/uploads/1/3/4/3/134341958/2195452.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/a97cd.pdfIn PDF document text
    • https://sumomaduge.weebly.com/uploads/1/3/4/8/134884200/2955272.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0cbc7c6d964583621a279/t/5fc1304b3f75b16643ff47a7/1606496331209/fixovavitomodexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f39ed5e1-4faf-42fb-bfc4-b13daaf8ef25/m_m_teacher_appreciation_printable_poem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cb9efc603311fbf61aa6/t/5fcf89c069d6d06d554465dd/1607436736089/air_strike_midway_eagles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5093ce00-8582-4a50-8173-b9a00e42eed8/dhoom_2_full_movie_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65581a13a450bab197ba5/t/5fd030a851357b44bb887460/1607479465026/stumble_inn_bloomingdale_nj_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc68cefa97599144edd5b91/1606847728009/zisimujexaveladisapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f90f6ee-c401-4044-a4f4-a73da7b63a3c/66010155868.pdfIn 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_off0000d280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 5024 bytes
SHA-256: c8054b23421d840dd8a9ac61ddb293155893dad5ae0fef5fa6d46978bb87897c
font_01_sfnt_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 10288 bytes
SHA-256: 833c9d18adda12fbbfab92152f46883c90b792d423437882751315167f61d54d

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