Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c98d875d455faa0…

MALICIOUS

PDF

87.7 KB Created: 2021-03-06 21:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ee1b6c1b9ec804cfc8b32d456a7cf4d8 SHA-1: 43dc606a88d142458d8755538c03807a168c7d79 SHA-256: 2c98d875d455faa09c8cd04eb4f89f021a2735b74519db2879d26e9543b80f8a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or a distribution mechanism for further malicious content. The primary URL, 'https://jumiwimov.ru/wix?keyword=greek+an+intensive+course+answers', appears to be a lure to direct users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://jumiwimov.ru/wix?keyword=greek+an+intensive+course+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450502/normal_6033c86ee93f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fc9a19e1a900.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377128/normal_600212b9b33dd.pdfIn PDF document text
    • https://dozajumeguru.weebly.com/uploads/1/3/1/3/131379069/1381488.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/2776889.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ffaade1ccb79.pdfIn PDF document text
    • https://fozirufimagez.weebly.com/uploads/1/3/0/9/130969558/1316395.pdfIn PDF document text
    • https://valefeka.weebly.com/uploads/1/3/5/3/135345526/buzakadefowafuki.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/wizamolovo_virel_jilenavuwi.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/9631444.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/bedejitiniv_koxamuxi_rolas_pawerowapujuse.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/73d4f258.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/bd57b00.pdfIn PDF document text
    • https://novadoja.weebly.com/uploads/1/3/4/8/134873208/sazesusozomijej_dofasevetolujam_nesetopokup.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/vogubef-raberexijekofuv.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/lifakeduruji.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/c8e3031ca677a38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410415/normal_5fcc4466aaa27.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/jelemubusebogirur.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/tubukeganuji/7375511046.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/voltage_drop_calculator_excel_format.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/responsive_email_template.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_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 5008 bytes
SHA-256: 76b6d0854ed78eefe6009b078118ab292aed003e96d79d4ddc748b8295ae38f8
font_01_sfnt_off00011464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11464 11432 bytes
SHA-256: 7b95cde44dbf8e0d57a8299fd307fc481f91a2ee1860d6d99d3bf090719a7949
font_02_sfnt_off00013bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 16240 bytes
SHA-256: 0674acd334b5d9d24fca46324cf24cdceda2da50095ae44f67deaeca14b27464

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