Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6765ac26de5faf8…

MALICIOUS

PDF

78.8 KB Created: 2021-04-28 20:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e515e4f2de6926211ccaa9d04b417682 SHA-1: 7fa8a131770727e3e3fc0e928e485f431767cb9c SHA-256: e6765ac26de5faf82120a9c02684ed63edfa1b55da06fb2fd62d9a649eec62fe
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'vilenefex.ru/strik'. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to DMV driver tests, suggesting a phishing lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=when+will+dmv+open+for+drivers+test
    • https://cdn-cms.f-static.net/uploads/4387242/normal_605fbf907d00a.pdf
    • http://mini-cam1.club/celsius_to_fahrenheit_conversion_tablekt2mr.pdf
    • http://choosenews.space/mibopibul8u998.pdf
    • https://cdn-cms.f-static.net/uploads/4459329/normal_606c2b165215a.pdf
    • http://koponegigat.medianewsonline.com/78063469431.pdf
    • http://tuimag.ru/95044528106tg5ea.pdf
    • http://kimidenexikox.getenjoyment.net/the_total_money_makeover_audiobook.pdf
    • http://bagomebefekixob.getenjoyment.net/vbspu._ac._in_result_2020.pdf
    • http://verification-help.com/movies_tamil_website_listfrbmt.pdf
    • http://new-leggins.site/fifty_shades_of_grey_film_moviey43ht.pdf
    • http://antinomi.design/how_to_fix_carrier_furnace_code_31r080x.pdf
    • http://zoguponuwuxoli.medianewsonline.com/mofebaw.pdf
    • http://carbags.site/421898481954dput.pdf
    • http://mavpa.fun/how_to_use_simplex_method_in_linear_programminguaksy.pdf
    • http://xufuzema.sportsontheweb.net/jurnal_akuntansi_keuangan_daerah.pdf
    • http://finonit.mypressonline.com/bubamefuvetivibuvitojij.pdf
    • https://cdn-cms.f-static.net/uploads/4486772/normal_6040bacb8f73d.pdf
    • http://webdefilmizle.com/storyboard_pro_20_downloaddhimr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40d5bbd6-d142-4f7a-9a03-2540f3103a7f/what_do_the_icons_on_my_alcatel_phone_mean.pdf
    • https://uploads.strikinglycdn.com/files/1a318a0c-0fc0-4f17-bdbf-ca98e2b8af43/dell_optiplex_780_vga_drivers_for_windows_7_64_bit.pdf
    • http://povodakav.myartsonline.com/tubimib.pdf
    • https://uploads.strikinglycdn.com/files/2897cdc8-b497-478b-b9d8-a898da424ca4/zilapuxogokojafabaxa.pdf
    • http://sogivuwe.onlinewebshop.net/autocad_tutorials_for_beginners_floor_plan.pdf
    • http://nunavaxukozu.onlinewebshop.net/accounting_tools_for_business_decision_making_5th_edition_solutions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f527.bin
f314ee69d5dc10b9fdac951e34c840c34e9ea8baced82c6b7b52d5c350963b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 5236 bytes
font_01_sfnt_off000106ec.bin
df1a0affadb6f14343c5f1625259988e3287ffbb0cc6308062f23398253e442c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 11288 bytes

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