Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e759842cbf527b…

MALICIOUS

PDF

80.9 KB Created: 2021-04-15 07:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 91eb269678332ab0a7f3941f4ab004ac SHA-1: e2046c5a10b82475dc031c69fee775c51b391eaa SHA-256: d0e759842cbf527bf5e53a5b0bdbc6ae8d8e958817f0b9d39f6c76ec654e5a34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://druttle.ru/strik?utm_term=how+to+turn+off+proform+hybrid+trainer', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/strik?utm_term=how+to+turn+off+proform+hybrid+trainer PDF link annotation
    • https://lifinupal.weebly.com/uploads/1/3/5/3/135336288/datutoterif.pdfIn PDF document text
    • http://neyroskakalka.site/do_you_need_a_certificate_of_divorce_to_remarryp4c9s.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/gifodab.pdfIn PDF document text
    • http://markettop.pro/68657607076jg873.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/tixaleva.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/3993a8140e.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/nonige-kopipoxafor-nukirafeki-xukegusuwilusub.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/kozuwewutujizikopivojidal0e5h.pdfIn PDF document text
    • https://rijomedoniki.weebly.com/uploads/1/3/5/3/135399424/robepafasewutufef.pdfIn PDF document text
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/fbaa46.pdfIn PDF document text
    • https://winokagadav.weebly.com/uploads/1/3/2/7/132740598/6051948.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/daxemo/prism_graphpad_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4240ea8e-4686-4fbc-a3e5-0bed6af3522b/xuxigipasizu.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/what_is_the_main_function_of_kernel_in_operating_system.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/outlook_meeting_request_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91222d2-0acf-4f51-ba70-3f7f46e3e55e/16098924664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb88c24-d988-415f-b527-4e72dac3d46d/honeywell_thermostat_wifi_rth6580wf.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/84834376613.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/99435662402.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/galemojaruriwoturolalowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc384b34-f612-409d-bf66-db2c96dc58cc/how_to_light_the_pilot_on_a_york_diamond_80.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/chloroform_after_side_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/lapale.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_off0000f843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF843 5368 bytes
SHA-256: 072670811c049d3b52336b6ab028129c829ed5b31f53c5877cfc991f7dc9acd8
font_01_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 12508 bytes
SHA-256: d022b18aecaa2e2c8459e6a75a233cfb0bdc5950ba9082ce5b50215729493b9e

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