Malicious PDF — malware analysis report

Static analysis result for SHA-256 e299d3eaa8eca6ce…

MALICIOUS

PDF

78.7 KB Created: 2021-03-15 04:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2118d8ada0a27dfd3d0302286c9a4bb6 SHA-1: a0b8899783417de82f3ec81c71ab66c87ebedc18 SHA-256: e299d3eaa8eca6cee62619afa2023acb6d5c9fbfd20f9bd6a6f66fb8fbd5e455
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious due to its function as a link farm, containing numerous external URLs pointing to potentially harmful content. The document's content is misleading, masquerading as a Minecraft recipe book to entice users to click on these links. The presence of a large number of external links on disposable hosting, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/award?keyword=minecraft+recipe+book+pdf PDF link annotation
    • http://checkyourcredit.info/31213640973wbxad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_60066c771eb31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5ff21f131cb59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_6039a75e38578.pdfIn PDF document text
    • https://zejenabo.weebly.com/uploads/1/3/0/9/130969472/7681028.pdfIn PDF document text
    • https://sapefesoj.weebly.com/uploads/1/3/1/4/131453354/jetufazikidalanikis.pdfIn PDF document text
    • http://glossywp.online/denedudinajogokakato0l9z8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6024847e3197b.pdfIn PDF document text
    • https://dibarovufi.weebly.com/uploads/1/3/0/7/130776786/vanibodo.pdfIn PDF document text
    • http://accueilcmb.com/80935111003ckpla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_600eca26b6bab.pdfIn PDF document text
    • https://vupebuxotilejo.weebly.com/uploads/1/3/0/8/130814562/navar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_4777fa3e1f384f258911d0c6ce681d6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a08f6a6-7c59-4bff-8fba-3988a390c05e/honeywell_th6320wf1005_programmable_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76106a61-5183-430a-bda8-0b463561232e/nuzasob.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_367e5dd2a91048e78ed802af6f2f3859.pdf?index=trueIn PDF document text
    • http://ravuxigud.epizy.com/grohe_ladylux_repair.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/ballena_azul_informacion_para_nios_de_primaria.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_582fe547b60243269a3a86d94379bc47.pdf?index=trueIn PDF document text
    • http://rowabereduxafu.epizy.com/loan_repayment_excel_format.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_c78864c5f6174ee48e20dd962e33f0e0.pdf?index=trueIn PDF document text
    • http://fezogax.rf.gd/ipcc_ar5_fifth_assessment_report.pdfIn PDF document text
    • http://punozow.epizy.com/kesolevanika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4179ee1-2272-4c6a-94cb-657fe53f82f9/how_to_change_digital_thermometer_back_to_fahrenheit.pdfIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_ef69f941213341afb72455ccaa23a454.pdf?index=trueIn 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_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 5148 bytes
SHA-256: 9467bf37536e46cf74f69b7f2096f9a4921e602beafbe9e7fd1d7713d886f00a
font_01_sfnt_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 11364 bytes
SHA-256: f2e1f039743eb42aa8c7830893b305bceaf3717d87a10e5c7e9bbd59e14f18f9

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