Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be6ce04a4eb16ae…

MALICIOUS

PDF

75.0 KB Created: 2021-04-24 05:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a596e17401ffd613792bd9d2d7d31950 SHA-1: c8bcf6e4f592392026a23b14e831167031a33290 SHA-256: 1be6ce04a4eb16ae6faac7300a1ec1d4300163c5e17f206a57c6ec8d2ca5148b
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to artificially boost search engine visibility or distribute content. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence score point towards a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=how+to+use+bissell+proheat+pet+12+amps In PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_605dc053887ca.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jMhLia6/sevubepaxolen.pdfIn PDF document text
    • https://xuzatikanuji.weebly.com/uploads/1/3/0/7/130775198/5dcb88f.pdfIn PDF document text
    • https://xuwulusepe.weebly.com/uploads/1/3/5/3/135310973/fogavuregi_minetomegi.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/1561c61c7b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fd5f0cf68fb5.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/FhaheWP/recarga_claro_peru_con_visa.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/ggiawMW/31732878199.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/dMwshbf/iphone_ding_sound_effect_1_hour.pdfIn PDF document text
    • https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/nusumusijobagiri.pdfIn PDF document text
    • https://kizevopizimi.weebly.com/uploads/1/3/5/3/135351298/tekimebejojamed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_9e627e0a32d14aae9fb10af3ee30ebfe.pdf?index=trueIn PDF document text
    • https://e62d90d9-845b-491d-b9b1-804d55ccd6e6.filesusr.com/ugd/6af1ed_f0841be693474cc2924aaf8265df8ad1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/codecademy_sql_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/active_and_passive_forms_konu_anlatm.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/consumer_reports_most_reliable_cars_2012.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/functional_programming_in_python_real_python.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/sensaphone_ims-4000_snmp.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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 5436 bytes
SHA-256: fa0a96529ba16f9214d6ee6493461494210c7a0c0cd884ed9cadb6e073aa7135
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 10720 bytes
SHA-256: b54f4ae7d228869ed40aeb739221a046651a5b78152b22099343ae38ecda50ec

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