Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3de26ef283803b8…

MALICIOUS

PDF

94.0 KB Created: 2021-06-07 16:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: adb6eff7145c91c2d88972478ad5cd86 SHA-1: eaef74ddefcd0ae6a6cd2167f57c98e7ce2bfda2 SHA-256: a3de26ef283803b8bd30cf1f4ba7a7a77d8ec4dc67b7bc7ed3da1336575659da
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://botokaw.ru/123?utm_term=best+fully+loaded+android+tv+box+canada', is presented as a search result, likely to trick users into clicking. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=best+fully+loaded+android+tv+box+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465147/normal_6009e5bc89d13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_6037ce0ac139d.pdfIn PDF document text
    • https://didemutigejibal.weebly.com/uploads/1/3/4/4/134400923/gewexuxofinurixitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_603915722cbff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_606e1f587a620.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_5fcd46a4e660e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_6012139a26fb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368767/normal_5fdf84a6889d3.pdfIn PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/ziribosorubede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_603f4558f2723.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/dolozuturidos.pdfIn PDF document text
    • https://gulesome.weebly.com/uploads/1/3/4/4/134496781/dogusekifavitilodivu.pdfIn PDF document text
    • https://fukajupiboxa.weebly.com/uploads/1/3/5/9/135973929/nisumilukovupib.pdfIn PDF document text
    • https://zunoratev.weebly.com/uploads/1/3/5/3/135345657/4854958.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/e6c9b0db-0d6b-4a93-a284-d9789c586824/dyson_cinetic_big_ball_animal_vacuum_cleaner_best_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530e0d5c-04dd-45a5-a500-dd58d0d1769f/basic_models_and_methodologies_of_the_software_development_life_cycle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b756969e-fc1e-4c3e-a3f9-9b56b423793e/tovan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db6824e-015e-4263-b972-33543548088e/porque_la_palabra_de_dios_tiene_vida_y_poder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a624887-e78f-432a-9dd0-bbcdf2b8412e/34051957744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d89744b-bde2-43cd-adb6-ec203a045323/how_to_set_a_honeywell_thermostat_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe98fef-3b69-4a90-876b-d287cc9e45f5/kiweru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef202783-c647-480f-94ac-0ce300dc4376/what_factors_led_to_the_beginning_of_renaissance_in_northern_europe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998916d1-5b78-45eb-a955-30a8d8d0d119/81477433858.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_off000134ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BA 5432 bytes
SHA-256: 6a35cf3d65550c835defe7d54284de24319a73e8ab2bfce74340d050cd15e4b6
font_01_sfnt_off00014757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14757 10408 bytes
SHA-256: 4e0effe289f2461acebd13e7ae957cd687940b825c59bc55e3c8482a552a71b1