Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc8fced6bbd7258…

MALICIOUS

PDF

75.0 KB Created: 2021-04-01 05:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f9cb9f1d7499edf2d308202533d1bdbd SHA-1: 22e13ed163a817c5f2790d50beb233f6548dbc93 SHA-256: bbc8fced6bbd7258f0403be129b9450ab328274967de5bdd7789cf281763f433
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'ponafet.ru', suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ponafet.ru/strik?utm_term=kitchenaid+professional+600 PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b451db31-e03b-4e8a-8d58-7d1448e4f855/37043493752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffb46e-e834-4a2e-8802-c68a198315c1/kolosesexiwufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb87cc3f-809e-4fb9-a6c8-bd69d10db157/rinnai_ruc98i_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad1fb11-5627-4029-bad9-46f958b7c511/lorodu.pdfIn PDF document text
    • http://lewomunenuvi.myartsonline.com/protein_smoothie_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909f6f9b-2c0a-4034-8dcd-380f5ae24d74/coh2o6_br3_name.pdfIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_b68bfa9961604710b446876b225e1a49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c42ba5fa-3065-4e02-a7ae-3555c14882ee/wirimekedoxuzat.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_678a2a5b305c4fecaabf2010ff58f466.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d8af9c-73cb-4d6f-a5c8-2b6fd3f1a3cd/pmp_certified_project_manager_salary_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b4a356-a407-454d-9d5c-9c02440aa400/fetix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ac543b-ea28-404f-bd6d-45c624f7fbac/unravel_me_lyrics_english.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_ffee3ff419224d39927286bf75e35264.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cd0eec-e36c-45dd-a30d-4cb2e6a2593f/bisusumezalevowanivazitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ad64ef-9397-4056-bd92-46a9c7cc9386/77641206149.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_7cd1f32d514d48a69d38ba53b76bc2c5.pdf?index=trueIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/list_of_all_warrior_cats_books_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135b511d-5c30-489a-99e4-eae710fc431a/binilake.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_off0000e729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE729 5508 bytes
SHA-256: 908ce78370079c1f5539fb42ac6d556e8debf5a3726d7981f56e80b49b262fb1
font_01_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 10992 bytes
SHA-256: 62407cdc30f88ca97c8f44de29cd33f8bd409159d157686a1bf29a5c54717815

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