Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e43eda65fa86d4…

MALICIOUS

PDF

48.4 KB Created: 2020-11-06 15:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ff542640008c13bf6a830dd3e0abdb3e SHA-1: d85ace9c50b35110a6639d970887245adc3b3279 SHA-256: 61e43eda65fa86d466bf51837ac2b46e0caeb3ca0397045acc12b96db662d1a8
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=play+candyland+game+online+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f8d559f6491a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8ff8503d263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5f9393442bc15.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/jofelo.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/d70ff341-7609-483a-9f1c-0a8a608ef197/best_of_both_worlds_concert_full_mov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162d7492-3988-41b7-b1be-dc1a1cd43e52/mamubapafimesamo.pdfIn PDF document text
    • https://dipadek.files.wordpress.com/2020/11/warframe_riven_stat_guide.pdfIn PDF document text
    • https://larevugarowu.files.wordpress.com/2020/11/difosobawovetexojitibex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde9ee0d-6a9c-4a66-b995-728a7bc7f4a3/charlas_de_seguridad_de_5_minutos_en.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4f2768-97c6-4edb-bb37-9f6a3c702854/cmsd_2019-_2020_school_calendar.pdfIn PDF document text
    • https://gobakige.files.wordpress.com/2020/11/anatomie_du_corps_humain_atlas_d_imagerie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaaedddd-4166-485e-9dec-32cd60873653/dunegazaxozerabalo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea855a46-0943-4aa7-a44e-56904ccdce40/gelexipusowutudazawijev.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_off00007f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8A 5264 bytes
SHA-256: 8776cf3077dc47879dba63e36852c0d44d86f6b7c69309c931db253d74f4287c
font_01_sfnt_off00009169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9169 10580 bytes
SHA-256: 71d355f4be905fcf3b8d16285a2a7340259f8df3cbdd8a0a3c9330b83f32caa4