Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eda8bf192894d25…

MALICIOUS

PDF

82.5 KB Created: 2021-03-30 23:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d0880aa0f661354c86d0d02fd9c710a5 SHA-1: f52ae7b6bf80406b284140c07aca5c4a50f6b7a8 SHA-256: 5eda8bf192894d25711ab7a317a12f240e9eb783188821439c968b57f7687c98
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the nature of the embedded links points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/strik?utm_term=acordes+de+canciones+en+ingles+para+tocar+en+guitarra PDF link annotation
    • http://xogunajeraxuda.mywebcommunity.org/wadetidoxupo.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/xesitit_nonenozej.pdfIn PDF document text
    • https://vubinejenifa.weebly.com/uploads/1/3/4/4/134444695/penazizur_nizad.pdfIn PDF document text
    • http://ririzobe.medianewsonline.com/burger_king_employment_application_form.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/fire_and_blood_book_free.pdfIn PDF document text
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/3237948.pdfIn PDF document text
    • http://xonigej.mypressonline.com/nifty_top_10_stock_list.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/html_all_codes.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/f_stecker_richtig_montieren.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/bangalore_map_free_download.pdfIn PDF document text
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/wamad.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/watch_the_woman_in_the_window_2020_online.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/myers_briggs_personality_test_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_c327155edea1409e9d75c2ec2917e165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/madagascar_4_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/pretty_little_liars_main_characters_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/shimano_ultegra_di2_rear_derailleur_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/15646995064.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_do_you_add_positive_and_negative_numbers_in_excel.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_89e8b8c954c64057958a8fd15cd1d1d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/58609699589.pdfIn PDF document text
    • http://jugugesazo.myartsonline.com/bowubuke.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/10456169205.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/firefox_versi_50._1._0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 5232 bytes
SHA-256: 0b386dbb8eb70556f22310abff318171a4fa9687da25247ca214e844137a6903
font_01_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 1888 bytes
SHA-256: fb837d8d2e7b6ff876074993d1faa48c00f8652074d5e7b79bdb67b3eeb562c2
font_02_sfnt_off0001121a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121A 12204 bytes
SHA-256: faa4d89eb8ea5bafec36c6c17bd014b3b141855e77d3fcc1988f120bbb82027e

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