Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5358fca06af86d…

MALICIOUS

PDF

68.6 KB Created: 2021-02-24 10:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fc4af1c8077295f59403860cf6e46a99 SHA-1: 49f2fad2c7d70888190080677c527876a9066cef SHA-256: 3a5358fca06af86da5a9fb33709a4dd506041696f44360a250baf7fd8b4c2cc8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector and another as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to direct users to potentially harmful external sites, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=potty+racers+6 In PDF document text
    • http://jnatural.space/lgk8_user_guidez330h.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/lesuxevebizusul-jijijezowaxake-siseko-ruvurubuwasozab.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/fQWjfgf/depitofewoga.pdfIn PDF document text
    • http://tixshopclub.space/17201019095trihv.pdfIn PDF document text
    • http://peskomment.ru/sobijebevagipagadifijuvjwjpa.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/O6jj9ic/27246181264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferisokigidakal.rf.gd/fisifewojenisol.pdfIn PDF document text
    • http://saderure.rf.gd/90477720601.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/google_maps_audio_not_working_android.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/zuveraxufudedolisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/laruxefelefos.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/jaraleden.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/rixojufikavis.pdfIn PDF document text
    • http://dekutob.epizy.com/shortcut_to_insert_row_in_excel_sheet.pdfIn PDF document text
    • http://lalukegadugubu.epizy.com/aunt_jemima_complete_pancake_mix_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/tabela_de_frequencia_estatistica_como_fazer.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/gekenozatosukeguvegegag.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/31129019502.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_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 5020 bytes
SHA-256: 63e0db54020c60c91a8c7041a75dd379e88937a0b3f19fbbf1b9b9f6acc87903
font_01_sfnt_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 10180 bytes
SHA-256: 17821fe9ec78367b9cc28d0e2e833b1ef8849cf9c8f77620ea839f6fbe22c26f

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