Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd74c88a7c30ebdc…

MALICIOUS

PDF

78.0 KB Created: 2021-05-13 08:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1ed3a7f55a23c1e406dde5b9c145f115 SHA-1: d6cca7ab0d584a6ee481496c0916a7d55e4bfa7a SHA-256: bd74c88a7c30ebdc1a1dbdc5d5e3be1f9986b377862a8d252c1e7880f1a20c54
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to a 'dance music videos download' lure. The PDF's structure and the presence of external links suggest it is designed to redirect users to malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://zajinet.ru/strik?utm_term=dance+music+videos+download PDF link annotation
    • http://vinograd.io/nilomufonubhibkx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_6053ec945ee9d.pdfIn PDF document text
    • http://davilebut.66ghz.com/pictographs_worksheets_for_second_grade.pdfIn PDF document text
    • http://nipikul.22web.org/causal_inference_for_statistics_social_and_biomedical_sciences.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5fdc1dd222c03.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/the_hormone_reset_diet_meal_plan.pdfIn PDF document text
    • http://zubiki.top/66841930089h5yje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_606a0a49d709f.pdfIn PDF document text
    • http://biweekamnf.com/roginulerunegudo9qej2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc7932239848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5fdd0e3841776.pdfIn PDF document text
    • http://avtoshtorki.shop/deregifiruwidanifemetabuxw6cfe.pdfIn PDF document text
    • http://bezigex.iblogger.org/93959634349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_604716e46c766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://latodunakajof.rf.gd/27535818125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6908604-a7b1-4ed9-b90e-2c7b5f183d38/zugosituvoluzubijir.pdfIn PDF document text
    • http://kirorewomomi.rf.gd/statistical_methods_in_analytical_chemistry.pdfIn PDF document text
    • http://gedobesixo.epizy.com/breakthrough_plus_level_2.pdfIn PDF document text
    • http://lenaxepejo.rf.gd/mandera_county_bursary_form_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafb6035-836a-4bbf-aa54-ab50f0948d4c/safe_haven_nicholas_sparks_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60669270-e272-4935-912a-aa37cdcfdd9b/descargar_discografia_de_los_tucanes_de_tijuana_completa_gratis_mega.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 5140 bytes
SHA-256: fdb214e60e91044b30f77d0308e2d08f4183aa45ec5007885d979e618e02d6bc
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 11428 bytes
SHA-256: 88db61ff9159675702615d806ffab899b105ba6d7835c797e4f2f9fe02002af7
font_02_sfnt_off0001159d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159D 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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