Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e182b9a32f89e5b…

MALICIOUS

PDF

74.7 KB Created: 2021-02-15 09:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 814d0162e1b3698b99a01a7445a1ffe6 SHA-1: 2ab7996525883e364db86520f63af2dd94e11b5d SHA-256: 4e182b9a32f89e5b14ead3c2abf070719cc30ec04fe0e73de5d243c70aba22ab
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or malware distribution attempt. Heuristics confirm the presence of malicious redirector links and a link farm strategy, suggesting the document's primary purpose is to redirect users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://yafferge.ru/strik?utm_term=loan+calculator+free+download+for+windows+10 In PDF document text
    • http://teaitalis.space/simile_metaphor_personification_worksheet_with_answers8qg5a.pdfIn PDF document text
    • http://pressit.space/14349691246p0xdn.pdfIn PDF document text
    • http://inmyshtangen.xyz/rexam46jc8.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/50a8019b1cfab59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_60255677281ac.pdfIn PDF document text
    • https://zizovelet.weebly.com/uploads/1/3/1/3/131380569/xufepodigu-fizavusajobas.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/78iiVjb/zeseguwejoji.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/lawixe-runif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_602206af02c2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479462/normal_5ffb680a24ab5.pdfIn PDF document text
    • http://13millions.store/context_clues_worksheets_grade_1731vm.pdfIn PDF document text
    • http://instup.xyz/33566211368g3qk3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401712/normal_5ff2109ca4a80.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/gejixjf/how_to_sew_pajama_pants_without_pattern.pdfIn PDF document text
    • https://dirasikazeta.weebly.com/uploads/1/3/1/3/131379856/mitapipaxuxi.pdfIn PDF document text
    • http://edalovert.xyz/organization_chart_template_excel_20168emwa.pdfIn PDF document text
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/5090201.pdfIn PDF document text
    • https://pewatusikowago.weebly.com/uploads/1/3/2/6/132683224/08ded0596a5c.pdfIn PDF document text
    • https://mugokirupela.weebly.com/uploads/1/3/2/6/132681863/wazejuzidekuwiwa.pdfIn PDF document text
    • http://daravto18.ru/51281187839iph2r.pdfIn PDF document text
    • https://wunovolal.weebly.com/uploads/1/3/5/3/135311751/9505965.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/1d42994b73fffc.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_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 5244 bytes
SHA-256: 648fd3e03d36f8a595794769321fd7f68a6a1b4dc2b89359b08375037a653808
font_01_sfnt_off0000f9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 10352 bytes
SHA-256: 4fb7faf51273f7814bfa82049640b789a8571cabaa43b6e35adb98b0770eaab5

Open this report in the interactive analyzer, or submit your own file for analysis.