Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2050d728b304ded…

MALICIOUS

PDF

74.8 KB Created: 2021-05-19 22:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 581ceab97c452169b09188c701a429c8 SHA-1: 10b5be2c14652e365063433fad7930ef599b47c3 SHA-256: e2050d728b304ded6a983afe01b990592eb6ceb1cea5c43ad0659d1416ad6241
162 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a significant number of external links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is https://crophysi.ru/strik?utm_term=full+body+home+workout+%2528no+equipment+no+noise%2529. The presence of a link farm and a malicious redirector suggests an attempt to lure users to harmful content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/strik?utm_term=full+body+home+workout+%2528no+equipment+no+noise%2529 In PDF document text
    • https://runaxaneked.weebly.com/uploads/1/3/4/5/134505854/37e02dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_60375c8dc47de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420248/normal_6045cdc857894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6010e31d73987.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/fawigasaju-mereb-vaxepokojamawi-paziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5fe954e8963f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_6008108249b8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ffad26963720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_606a097d0c957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b1b656-7ed7-45ef-a780-8bb9a0d2073b/vitamix_parts_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ebb306-c07d-48e9-831c-8e2dd6a84375/lefazisenekutorimafujidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8456405c-45e4-4e3f-9045-4795da888e4a/76624003840.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/rabazarid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99bf7a24-62a7-4acb-9fe3-69437522973b/braun_exactemp_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46e538a-9001-40a7-b8ab-ef824da5761a/whats_on_25_days_of_christmas_tonight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f35661b-f7eb-4c74-ae89-0b230ef5cd87/first_alert_carbon_monoxide_date.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/vazujenejo.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/6360986684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881f7eec-ae8b-4110-b2b0-1da4cbcaeffc/how_to_fix_refrigerator_water_dispenser_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/masonojizafisepobalas.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_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 5624 bytes
SHA-256: 81e008bab54211bd0ddb59b773f927393f466e211c7b091e275e6ab40c59c07d
font_01_sfnt_off0000f802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF802 10512 bytes
SHA-256: 5b49de12e60c15f8e154458cbcfb7e11fe5300759e44fc6d1dda937c1dba1e6f