Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56d0f542780651b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 20:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0938473a61bf95e8a6e9e29d12b455a2 SHA-1: 14a8f5a258c1cd7878a578bfc60fca49e7fa7df3 SHA-256: e56d0f542780651b9e93ddcd36cfa86c61a83266d7f52d4386c0fc7c7f4afe33
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and likely forming a link farm for SEO manipulation or phishing. The embedded URL and the document body suggest a lure related to generating fake birth certificates, which is a common pretext for phishing or distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=fake+birth+certificate+generator+bd PDF link annotation
    • http://bixekakazozerol.mywebcommunity.org/80130187481.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/konubuteniwo.pdfIn PDF document text
    • https://vosilidasum.weebly.com/uploads/1/3/2/7/132740263/pazeni.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/3e821bfe72.pdfIn PDF document text
    • http://francobusiness.com/73476691728l8g80.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/navosimuwolowinapete.pdfIn PDF document text
    • https://loruwudo.weebly.com/uploads/1/3/4/7/134738316/geboji-boxaka-zuteme.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/kelegasakedosifetale.pdfIn PDF document text
    • http://digitalmedialit.com/salesforce_service_cloud_certificatione4cr5.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/55919270117.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/botodexotakuxati.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/aphg_study_guide_answers.pdfIn PDF document text
    • http://jalojewaga.mypressonline.com/36611963668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_8f84083f7749409f9082af978a7d82ab.pdf?index=trueIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_8576dc34536b47deba50935e7e78e2d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4a4a22-ea1d-415e-81fa-c3fa125bf8fb/what_is_tcp_ip_architecture.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_50eea626dc3d4800b00da66c92cdf92a.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_4bc29cce7a844e11b1ca40ff714ae1b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ce75d8-c628-4a22-98fd-634cad20943c/jexikitizimase.pdfIn PDF document text
    • http://rijonitapadon.myartsonline.com/metaphysical_poetry_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487ea3e9-3f57-4eb3-a81c-a152dfa629ca/nugobikerezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c67f87ef-37b0-4372-8b85-6b042baeb8bc/relacion_de_materia_y_energia_en_quimica.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_629e75cd0c154d009b6c3d2f44f13d40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f6b9ec-c288-4b24-bf86-6db2d22cceeb/can_you_adjust_the_temperature_on_a_george_foreman_grill.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_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 5232 bytes
SHA-256: 499e6d8b1f3c810e8456adede93a94d4ca300fa32af877f4efa5229958c274a4
font_01_sfnt_off00010274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10274 10824 bytes
SHA-256: fefab3cf2c6817f30752e2f5d01152a5daa8bc2d6144dd72cbaf6736b0586bd6

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