Malicious PDF — malware analysis report

Static analysis result for SHA-256 f220b72e97b8e461…

MALICIOUS

PDF

98.3 KB Created: 2021-05-16 17:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 436d6a7c01e4bc7ca336279969d4609f SHA-1: 00ff92ede6361d6e7f2693cba51f4d60ea57bf2a SHA-256: f220b72e97b8e461d61d2242f0429d08390bdb2830e0880ff5a1af5b41469f79
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'Thinkorswim web platform login', suggesting a phishing attempt. The presence of multiple disposable domains and link farms further supports a malicious intent to distribute phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 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://dafemum.ru/strik?utm_term=thinkorswim+web+platform+login In PDF document text
    • http://webdefilmizle.com/21838461320wn1jd.pdfIn PDF document text
    • http://shoppermarket.online/bibekuzapusagojg8dst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_602f298e27592.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/75979293100.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/16840735249.pdfIn PDF document text
    • http://extraterrestrials.space/indian_economy_objective_questions_and_answersdn36i.pdfIn PDF document text
    • http://slampochka.ru/human_physiology_book_cc_chatterjeeby3ro.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/la_biblia_latinoamericana_online.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/antecedentes_de_la_administracion_en_america_latina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388617/normal_6001d3bc4ee0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_6065626114abc.pdfIn PDF document text
    • http://presalle.xyz/teks_sholawat_burdahj2826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427820/normal_606aebc6b9b19.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/nadoforasegerusososodi.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/dafovodotijemavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_6016216c13d59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_6f71a112871842f597a056927868f06c.pdf?index=trueIn PDF document text
    • http://butorinowu.myartsonline.com/extrinsic_and_intrinsic_pathway_of_apoptosis.pdfIn PDF document text
    • http://zigadewat.epizy.com/38398843568.pdfIn PDF document text
    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_c3b4457c73a54341ad9c90cf8b854cdc.pdf?index=trueIn PDF document text
    • http://kunonepu.rf.gd/case_study_research_and_applications_design_and_methods.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/98989331647.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_5dc8867bda3a42bb95ac1886c8068fab.pdf?index=trueIn PDF document text
    • http://gegilifopom.myartsonline.com/dizijofirakavabepexa.pdfIn PDF document text
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_abe9291e52924938a41dc48be270b868.pdf?index=trueIn PDF document text
    • http://dipimov.epizy.com/f._a_full_form_in_education.pdfIn PDF document text
    • http://bosomonuzopedu.rf.gd/curso_de_ingles_intensivo_gratis.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/bissell_spotbot_pet_how_to_use.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_off00013eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EEF 5560 bytes
SHA-256: 37951c1cd7b7b10560a3eff383f961731c3b5ac8817ed0d15d5af72fb03ab40f
font_01_sfnt_off000151bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151BD 11608 bytes
SHA-256: b5ec247eb9a0537a8d5b8748d739aa7fe2f72f53942e960576c3c8c2da1de730