Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d66b05a9dcbf995…

MALICIOUS

PDF

68.5 KB Created: 2021-04-08 03:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7e33c8fc8ed9ea9230a136648e77a01e SHA-1: c9d2f5fb6a7652fb6426530213710c5c6a0d4d09 SHA-256: 2d66b05a9dcbf995c27cf7bba5122f286b676a54dfa5d6feda5efee226c55037
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to obscure the final destination, likely a phishing or malware site. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://seumenha.ru/wix?keyword=pioneer+clothing+co PDF link annotation
    • http://texno3ua.com/kenmore_665_dishwasher_reset66lmc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_6067992f9379f.pdfIn PDF document text
    • http://kneeksi.ru/nulixekinaxenilgyti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494140/normal_6058572692034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_603568e81050a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5ff2a5a23abf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_604de5494b38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_60127c19a678a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_6005d9b1c1e03.pdfIn PDF document text
    • http://fruittea.space/23842970763nktau.pdfIn PDF document text
    • http://poroda.site/dagarobobekobejonobusavmv.pdfIn PDF document text
    • http://regse.website/302373316909g7ye.pdfIn PDF document text
    • http://jopulemasawo.22web.org/improve_sense_of_humor_books.pdfIn PDF document text
    • http://eurozone.pro/xbox_1_controller_a_button_stucku542t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_6054f250d9d92.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenivut.epizy.com/6391816907.pdfIn PDF document text
    • http://menotuzuv.epizy.com/diablo_2_rune_hunting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02cd2924-d153-43ed-98cd-2220e3dbe504/bobaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e7af76-6605-4cf5-bac3-4299e8bf7039/22964676159.pdfIn PDF document text
    • http://kogopixipinal.epizy.com/adobe_scan_to_free_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca73e89-44e1-4b5d-b4ff-a657bcaa658d/18731911427.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_off0000d1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C0 4672 bytes
SHA-256: d9adaf1e2c4cdb9b2fe6372d554bc43e5c67da0115e44b089e6f4db7fdca9ad9
font_01_sfnt_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 10228 bytes
SHA-256: f2cc77ac6ce37c4b1e6631728d4035b8539ca35f5154bf499c8efdfde633a1d5

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