Malicious PDF — malware analysis report

Static analysis result for SHA-256 17244595218d303e…

MALICIOUS

PDF

90.4 KB Created: 2021-03-23 07:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1db8a3e4c0c4573ba2b6fef19de81cd SHA-1: 7b91dda2090588aaf1a2b6c99e0cc7b93067cbfa SHA-256: 17244595218d303edcfebace9993e3c192f579cc813f3e4f3f5ffb1f84fff947
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'bologen.ru' disguised as a prostate cancer treatment plan. This suggests a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' further supports the malicious nature of the document. While no scripts were explicitly extracted, the structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=tratamiento+hormonal+cancer+de+prostata+pdf
    • https://vifegozotamideb.weebly.com/uploads/1/3/4/2/134236473/tubex_jiduzitanu_kelomo_sasib.pdf
    • http://stavki-na-sport.site/xemonerexubilugkdtml.pdf
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5ff5264b28e95.pdf
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/gusigipipivawegezes.pdf
    • http://sallles.ru/calendar_2020_september_month4nvgr.pdf
    • http://datingsexchat.site/rounded_corners_for_baseboardsbb00k.pdf
    • https://vezutubiwewo.weebly.com/uploads/1/3/4/5/134507618/rixezopesuduvizom.pdf
    • http://kind-insta.site/31000630530j452u.pdf
    • http://yozi.store/how_do_i_reset_my_remstar_m_series5an2w.pdf
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fe53d016ae98.pdf
    • https://cdn-cms.f-static.net/uploads/4393889/normal_602d2dc700f00.pdf
    • https://visemuturivawo.weebly.com/uploads/1/3/4/6/134673250/47a7b5318e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fizup/39038773124.pdf
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_31ffa811f83042368c810d24f1ca0190.pdf?index=true
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_d711fad9e1394df8bad8f51c06929087.pdf?index=true
    • https://s3.amazonaws.com/luxelula/corrective_action_plan_template_example.pdf
    • https://uploads.strikinglycdn.com/files/c56cf007-07d1-4ffe-ab53-7bf2e44ea977/biblia_de_jerusalen_en_espaol_para_descargar_gratis.pdf
    • https://uploads.strikinglycdn.com/files/3e057da9-97b8-45bc-85ca-ed03d89f3ba2/82119837531.pdf
    • https://s3.amazonaws.com/risisipajole/87614726969.pdf
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_8eaed8690b7342168d90f2f323897f35.pdf?index=true
    • https://uploads.strikinglycdn.com/files/60ccdf30-1196-41d6-a02f-b078b9d4595d/52481641847.pdf
    • https://s3.amazonaws.com/befafuni/brighton_secondary_college_uniform_shop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e1c.bin
4ca2c13a7592a85e4c0277067eea9a2fe8449d26c536eb3558acd2c70fd107da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 5344 bytes
font_01_sfnt_off00012019.bin
af217561ba240f637e0e4937516c3fa6df8412cc6c62e0d78a0ce4d594e0aba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12019 11724 bytes
font_02_sfnt_off00014654.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14654 16204 bytes

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