Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a637a2eedb7ed0b…

MALICIOUS

PDF

75.2 KB Created: 2021-05-13 03:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8f6d30ad4923434392df22eecdeceae SHA-1: 7457f3fb4c52d1947e070b5a73f0a86475464ab5 SHA-256: 7a637a2eedb7ed0b912ef027d3016b0ddfd54892be70d6e624bbd7146c7f7207
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/strik?utm_term=spoon+river+college+bookstore PDF link annotation
    • http://jofufunobek.sportsontheweb.net/gafazemofuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475376/normal_5fe5bea1d40b0.pdfIn PDF document text
    • http://gikafowezogupij.mywebcommunity.org/the_adventures_of_sherlock_holmes_book_free_download.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/memizusun.pdfIn PDF document text
    • https://cdn.sqhk.co/refimadaraze/hggkFwV/netflix_on_laptop_windows_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416132/normal_606cdc2ed9b3e.pdfIn PDF document text
    • http://pexarinolal.mypressonline.com/56047333728.pdfIn PDF document text
    • http://boothattendant.com/fonilekorusujukazesojovr6ci4.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/fetivibulifedogakipeworuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_60158cda9347f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601fa0d52fa39.pdfIn PDF document text
    • http://save50.pro/intervals_of_concavity_kuta_software_answers7btwe.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovusig/hhKfjcm/change_wifi_to_private_network_windows_10.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/voniwapuvovoxukuzel.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/que_es_dolor_en_el_hombro_derecho.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/zomutojazom.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/tgdihYZ/nopiw.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/hfEMsl1/89129289379.pdfIn PDF document text
    • http://medway24.com/can_i_return_my_cutco_knives9djx1.pdfIn PDF document text
    • https://cdn.sqhk.co/gotubosif/7gfYUgi/xajorogegifed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_5fe696177d315.pdfIn PDF document text
    • http://gatorama.fun/robavulezudotebe466h2.pdfIn PDF document text
    • http://lnstagramsecurity.net/how_to_bypass_lid_lock_on_cabrio_washerr7c06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kilarosine.atwebpages.com/75779968536.pdfIn PDF document text
    • http://pefimubis.myartsonline.com/wefuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 5044 bytes
SHA-256: 0d2c15d5d1d301722343484122fd461133b82520ed6b3af373492c6024ad23e0
font_01_sfnt_off0000ea4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4D 11472 bytes
SHA-256: 9d4898ba6d2d46564c50bfaf0be06d3278d981eb2c785b98346f5f7e7d0de254
font_02_sfnt_off0001115d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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