Malicious PDF — malware analysis report

Static analysis result for SHA-256 029f535788be14f1…

MALICIOUS

PDF

85.0 KB Created: 2021-05-13 06:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 71f41dbc7f4e279abeee1942b022c1cf SHA-1: 101720e24bf357188147834f771e04c00f7dc1a2 SHA-256: 029f535788be14f1ba97edb4cbe02e95c84cbcf6af03b20c1203e30e233f4ae8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded links, such as 'https://jacksth.ru/strik?utm_term=bmw+navigator+vi+manuale+italiano', suggest a phishing or redirection attempt to malicious sites. The document body, though heavily obfuscated, contains metadata related to PDF generation, indicating it's likely a crafted document rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://jacksth.ru/strik?utm_term=bmw+navigator+vi+manuale+italiano PDF link annotation
    • http://kinorio5.xyz/love_yourself_heal_your_life_louise_haydtwoh.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/4962154597.pdfIn PDF document text
    • http://sexesex.site/6236480144711h22.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/auditoria_seguridad_informatica.pdfIn PDF document text
    • http://monstergym.ru/how_to_say_yes_please_in_mexicanr3kmg.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/c_language_for_beginners.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/resumen_del_capitulo_6_de_la_novela_el_color_de_mis_palabras.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/how_to_get_confidence_to_talk_to_someone.pdfIn PDF document text
    • http://orbitan.fun/zepuzekelorelidewirobugijxnebk.pdfIn PDF document text
    • http://melowimaz.getenjoyment.net/antares_harmony_engine_manual.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/camisole_sewing_pattern.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://suxorodefis.epizy.com/occupational_health_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74a55eb-80df-4041-aab2-4dd228c10baf/precalculus_textbook_mcgraw_hill.pdfIn PDF document text
    • http://ruxezila.epizy.com/palm_reading_book_free_download.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/16533068759.pdfIn PDF document text
    • http://gesinofafag.epizy.com/binge_eating_disorder_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45baa34-0d75-4371-9d8c-5570db9b47af/2504701407.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/multiplication_and_division_of_algebraic_expressions_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2600e6e9-fba4-490c-994a-3ac2b1fc1c3c/24037940116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6730980f-8011-4114-a4f1-5ed8de18f1a8/16395331960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc54c43-d71b-4b4d-a8f4-a0d1265f9e5f/how_to_be_the_best_financial_advisor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa88ddb9-faf6-45fb-9b7a-13a6b053df5e/70838608242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03e5be72-fe47-44fc-8e73-dcd6d677de39/29871827179.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 4912 bytes
SHA-256: 7e95286fe53df9f1ba92d7b50c9196fbc1b4fe5f1031871a5110a32c3171782c
font_01_sfnt_off00010f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1A 12096 bytes
SHA-256: 21a6a9cb6fd293dd6bc265835087f82970e49cf31ef9505c0b8708036b6cfda5
font_02_sfnt_off000136d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378