Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43ee7819fef38ce…

MALICIOUS

PDF

78.8 KB Created: 2021-04-07 01:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4bb3ebe81fd48d3e5145735cab0b05e4 SHA-1: 98262046ac7fb157fbf379c48b4c50323b7b74c1 SHA-256: c43ee7819fef38ce2a4922b4f8d2099ab285fd5e536306f3a4f4b3f9898e4690
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a PDF phishing trojan by ClamAV. It contains a large number of external links, many pointing to SEO redirectors, with a primary malicious URL identified as https://botokaw.ru/strik. The document body, though heavily obfuscated, contains references to search terms and application metadata, suggesting a lure to a website. The presence of embedded links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://botokaw.ru/strik?utm_term=is+zojirushi+a+good+brand PDF link annotation
    • https://s3.amazonaws.com/womirofop/charge_sheet_online_telangana.pdfIn PDF document text
    • http://shoop-fp.ru/20452573380cvdz3.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/kung_fu_panda_4_full_movie_free_online.pdfIn PDF document text
    • https://xogukozatakik.weebly.com/uploads/1/3/1/4/131453421/5644432.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/risk_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/mechanical_engineer_role_in_manufacturing_company.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/20568244663.pdfIn PDF document text
    • https://zilexewutefak.weebly.com/uploads/1/3/4/6/134608169/11f8e.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/rikagibiritup.pdfIn PDF document text
    • http://kivafijap.mywebcommunity.org/chain_of_custody_form.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/mapa_barcelona_ciudad.pdfIn PDF document text
    • http://leafester.online/31571432956qg5m4.pdfIn PDF document text
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/tuxiv.pdfIn PDF document text
    • http://sfhgfje5df.xyz/okin_lift_chair_power_supply_transformer_sp2-b_kitjzzfq.pdfIn PDF document text
    • https://sirususi.weebly.com/uploads/1/3/1/4/131407567/7476350.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/75bd4fac51.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/tchaikovsky_violin_concerto.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/manual_handling_risk_assessment_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/xonenupufepekofafazipowew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_7979a49271854c568524567e5778fffa.pdf?index=trueIn PDF document text
    • https://264cdfe8-48fc-440e-bff3-938583425051.filesusr.com/ugd/cd20dc_1437366830654f0cac088fdd5cc856c2.pdf?index=trueIn PDF document text
    • https://4b3c1411-62fe-4b74-ac0d-dad8ff5dd90a.filesusr.com/ugd/d10829_eefcd26bb67f48efb185f1f656380a77.pdf?index=trueIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/attendance_management_system_using_face_recognition.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_8cf8d831e6f04791b10b3285788c14de.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_e7f62338e33741959e5a3e691b8f4a7c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 2900 bytes
SHA-256: 5226c763f3d4f3cbceb38bcb13217c6b3d4a8982263ccab1e51df51dbcfe70e9
font_01_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 5256 bytes
SHA-256: 6024d806544970fd93db08cdc435ed2e2a04c71dfb5468a74245449bf2091b74
font_02_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 10936 bytes
SHA-256: 0b8979525f32bcb7bb2e7fd9fc9afb12220ca7f92896e1c77ee9130f0b724f52