Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec566c6bb68d7058…

MALICIOUS

PDF

77.7 KB Created: 2021-05-11 23:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ce88d534a0926c9d3ec4474cc300d32c SHA-1: d3a7ecb9cec3b109d685451e8e02addd0834b0eb SHA-256: ec566c6bb68d705885316262bb80c198d65273776c3c97c58d318f7c3deb35a7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan, and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs, with one prominent URL pointing to 'mezovuduw.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to appear as a search result or document related to statistical books, a common lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=best+multivariate+statistics+book PDF link annotation
    • http://zesegalos.scienceontheweb.net/68432442017.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/50475988228.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/5514e06f7b8394f.pdfIn PDF document text
    • http://digitalmicroteter.xyz/towazuriwekasalnw0g.pdfIn PDF document text
    • http://tobepotalesozaj.22web.org/human_resource_management_books_indian_author.pdfIn PDF document text
    • http://anarchymedya.com/how_to_start_contempt_of_court_proceedings7pf4e.pdfIn PDF document text
    • https://lavovozanu.weebly.com/uploads/1/3/0/7/130739022/1347824.pdfIn PDF document text
    • https://tuwagufo.weebly.com/uploads/1/3/3/9/133999840/ranomu-nubasilevixibo-pojuwebuba.pdfIn PDF document text
    • http://tryplafond.xyz/maven_setup_in_eclipse_toolsqaw4omw.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/79619095751.pdfIn PDF document text
    • https://wezuzasiteva.weebly.com/uploads/1/3/1/3/131397996/2cdd3.pdfIn PDF document text
    • http://japancar-sib.ru/proform_385c_treadmillr10um.pdfIn PDF document text
    • https://jepirozo.weebly.com/uploads/1/3/4/4/134474462/kitofubipubiwaj.pdfIn PDF document text
    • http://help-service-support.com/aoe_3_asian_dynasties_full_versionyswch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexefobixavater.myartsonline.com/43454280845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3161f1d4-196d-42d6-991e-93e3f491455f/kixatoririguwed.pdfIn PDF document text
    • http://mujebik.atwebpages.com/fosulofunededowoweta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1b2d5e-5bd0-4a23-8836-a3026e4fb11d/what_is_the_smallest_roku_smart_tv.pdfIn PDF document text
    • http://midugome.rf.gd/madilab.pdfIn PDF document text
    • http://dinixebun.epizy.com/aqa_a_level_chemistry_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07dd24ae-3a0b-4bfb-8f25-3a1bb9fc2f28/67601353209.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/film_genres_activities.pdfIn PDF document text
    • http://pagarome.rf.gd/62768310960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4634303-8a21-4654-b394-4db38f7dad6f/what_religion_did_christianity_come_from.pdfIn PDF document text
    • http://bimivopi.epizy.com/catholic_lifetime_reading_plan.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_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 5256 bytes
SHA-256: 34a2041630592059e1b53aff018675a6f9a9ae3c92f0e4392af14d9a1bdbfb49
font_01_sfnt_off000103cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CB 10924 bytes
SHA-256: 4534a9961858cdd170feee6830f6834a104eb70df9801fba43e6eebcbdf95728

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