Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c042ba537de1b92…

MALICIOUS

PDF

60.1 KB Created: 2020-12-10 13:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2ab7a56ca0b30dbb9a41e520861c043d SHA-1: 74989702ee36603e50ff0eb6aaf1567dedbb3afd SHA-256: 6c042ba537de1b9243cb9541fc95a9d3a19c5412d3f69a42b979f00483a7b757
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to a math PDF, indicating a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=aide+memoire+math+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5381a405d5340f345f063/t/5fc9cf01cf87d0256fed9a40/1607061250983/expert_home_design_fun_games_packs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28709affbf90a66f4d793/t/5fca7dddb6652f4a35b117ec/1607106016445/best_buy_deal_of_the_day_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6dc358-0b62-4547-a72b-1fbaeb00ad15/xinuribivowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57008ecd-644a-4014-a625-34347c0351a6/1004110038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4964ec-88c8-4068-9e90-7ebf6741f141/56314022936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6b4587-a6a5-46cb-a80f-953c43d22d81/jack_lalanne_power_juicer_pro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd27764f21657362f41879/1606231929220/shark_navigator_nv22s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8fc5c4-9035-4b57-9091-ef15b493fcf1/33786472299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1452e63-2c5c-4a83-9d86-cdfb1865c209/peviletozabuwawoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e8305687f52b6b812c21/t/5fc129bc9d79364840b729ea/1606494653409/electrical_panel_template_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50836bca-4865-49c7-846e-c0ed9566f3b0/gta_5_xbox_one_code_generator_no_survey.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fcbdf12bce7087d1ae9da89/1607196443980/cnc_machine_operator_training_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711f737a-0d8c-429d-8b7d-bdbbd888c7ef/gb_group_sa.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_off0000b035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB035 5060 bytes
SHA-256: b6457bbded46a48b194c63cb6f8d5724b538b919783370543a08c8d586fb1097
font_01_sfnt_off0000c13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13D 9776 bytes
SHA-256: 18c376c0afe3d67f7abd4f4c2e5e2f692f1088ac878e30a24756a1cc425453fe

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