Malicious PDF — malware analysis report

Static analysis result for SHA-256 265d4d0422a5c765…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 11:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: fce372ea24d2d5e606ae3cc11c6bb142 SHA-1: 98d909990f97d063915f76e7c776e2626672993c SHA-256: 265d4d0422a5c765fbacd56c633d8f1d71a7092bb8608f74ef1d10342753c3e6
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a malicious link farm designed to redirect users. The ML classifier strongly indicates maliciousness, and the document body, though heavily obfuscated, suggests a lure related to 'Salts and solutions worksheet answers'. The presence of multiple disposable domains and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://mezovuduw.ru/wix?keyword=salts+and+solutions+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427094/normal_5ff21e0379118.pdfIn PDF document text
    • http://erogan24.website/xubivefixazevumobezi6gt1.pdfIn PDF document text
    • http://nesarose.sportsontheweb.net/76224747007.pdfIn PDF document text
    • http://on-arenas.com/basn_ve_rzgarlar_slaytanxa7.pdfIn PDF document text
    • http://gisisavodure.22web.org/89591234317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5fd95abbadd97.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/sat_test_10.pdfIn PDF document text
    • http://regsenatvumen.website/cuerpo_visualizer_basado_en_medidasyogh4.pdfIn PDF document text
    • https://botutubinev.weebly.com/uploads/1/3/1/6/131637728/8871936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5ffab2153516f.pdfIn PDF document text
    • https://bomupafevusoze.weebly.com/uploads/1/3/1/4/131407549/9639780.pdfIn PDF document text
    • http://jushq.club/quantos_digitos_tem_o_titulo_de_eleitormuvg6.pdfIn PDF document text
    • http://stixlife.info/download_galaxy_on_fire_2_hd_apk_dataaqvb0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/crowsnest_pass_weather_report.pdfIn PDF document text
    • http://zutavifefif.epizy.com/rapokajenefawutido.pdfIn PDF document text
    • http://wotalajo.epizy.com/axial_skeleton_system.pdfIn PDF document text
    • http://susabumo.atwebpages.com/certified_internal_auditor_part_1_study_material.pdfIn PDF document text
    • http://wiximevisek.epizy.com/24894864281.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/giburisutakavimetosu.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/refej.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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5172 bytes
SHA-256: 77a309630618f8d3cdd0289906ec666d0ef85bf376f14b3510590151765c5490
font_01_sfnt_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 10900 bytes
SHA-256: a1e38c49f4fb66a3e1d4941d6308346624276edbe6e0d156b5ba0d2387ddcbd7

Open this report in the interactive analyzer, or submit your own file for analysis.