Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83017e6347d1b4d…

MALICIOUS

PDF

79.8 KB Created: 2021-03-28 23:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6a96303c5db959bf76628d6c0d5b3a63 SHA-1: cc4014fcc1790a5ac99d46d61993ed634c56468d SHA-256: c83017e6347d1b4d3975d943723f3517ae5b2f26057b3b3574bedb70fbc8022c
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and a phishing trojan. The embedded URL 'https://soxebez.ru/wix?keyword=leon+dufour+pdf+descargar' is presented in a way that suggests it's a search result, aiming to trick users into visiting a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=leon+dufour+pdf+descargar PDF link annotation
    • http://ppl-nutrshopfit.website/doxodewelobexebek67qv.pdfIn PDF document text
    • http://mjawebdesign.net/roku_3800x_remote_replacementlowwv.pdfIn PDF document text
    • http://romeital.space/dead_to_the_world_tour_blackbear_setlistz04kq.pdfIn PDF document text
    • http://namedaun.fun/foxit_reader_pro_gratis1uzbe.pdfIn PDF document text
    • https://cdn.sqhk.co/moxoxitij/jjeEgi6/is_traffic_run_free_on_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/bagojenul/dWifcuk/29294520700.pdfIn PDF document text
    • http://arfesopt.com/what_is_the_meaning_of_beyond_the_veil0b6nt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_cc21a16419ab498682be0f9485c2b29c.pdf?index=trueIn PDF document text
    • http://wubulunonowov.epizy.com/resttemplate_post_json_headers.pdfIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_75d17046c2ae411da012bd124acb4b06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divexikav/wuwenenuxub.pdfIn PDF document text
    • http://wekujugom.epizy.com/catch_22_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/what_happens_when_you_eat_too_many_fats.pdfIn PDF document text
    • http://runobukep.rf.gd/50551803982.pdfIn PDF document text
    • http://kofipazefoleris.epizy.com/american_heart_association_bls.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/9482115693.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_1dab2534f70043ecacbc123411f4a070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goviwigax/ninafobifeba.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/adding_new_sheets_in_excel_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/headway_beginner_workbook_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/pibeda.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/90049796394.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_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 5232 bytes
SHA-256: f31c25c7c3904c41b393f6709ae953e449bf37b050c1af67f0e72a256282dace
font_01_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 12512 bytes
SHA-256: 03d3edd12d3c5369a03f6dcfd2ca865040f8e6e36b761e913c742baeea5f9cf6
font_02_sfnt_off00011a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1C 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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