Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc5c915c2c69208b…

MALICIOUS

PDF

85.3 KB Created: 2021-04-06 18:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a8c8c8f5f5b83775e9d6e1dae793e017 SHA-1: 531f44ba6b321c9d542b47406b68ccccb3e07487 SHA-256: cc5c915c2c69208b1486212942bc4f9062cc7e148ceb7687bb55dc2b55db2bcd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://soxebez.ru/award?keyword=bass+guitar+basic+chords+pdf PDF link annotation
    • http://pifadopagel.scienceontheweb.net/free_10_day_green_smoothie_cleanse_recipes.pdfIn PDF document text
    • http://dkmz3.club/54530076039fep6r.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/frozen_shoulder_rehabilitation.pdfIn PDF document text
    • http://findssldz.xyz/jabigurizirulupivafebirai5bdr.pdfIn PDF document text
    • https://cdn.sqhk.co/tojorovexuw/chiDsXp/archery_championship_2020.pdfIn PDF document text
    • http://summer-italy.fun/gipsy_kings_hotel_california_guitar_pro80z9m.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/imgc2ja/kuxididivazarize.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/Zhehgje/adobe_acrobat_dc_pro_2015.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/59586202590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_606ace87da4aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_60049c3018cbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_60623752dd763.pdfIn PDF document text
    • http://item-get.top/zujumazirigeni9h4sg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491151/normal_60449fdc9c892.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/iugfhjM/5279625673.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/k2igiby/christmas_movie_quotes_trivia_questions_and_answers.pdfIn PDF document text
    • http://inscarusa.info/temperature_in_washington_dc_in_march_and_april81cuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_b140c87e503a4c1dba3f30f69d79e832.pdf?index=trueIn PDF document text
    • http://tobikinos.onlinewebshop.net/wimiwibuwedisolegudifufon.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_e66f181c821c407786971803134ff969.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/607c9da7-c1b1-49f9-85c2-af5f6b15a447/vazasulilorugekaridu.pdfIn PDF document text
    • http://mizetum.onlinewebshop.net/2092474804.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_933c66f3d2b84eccb794ef1f6f925b3c.pdf?index=trueIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_66467cd5e5484ff2afc8ee552c654292.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/014f380b-2347-4648-9f16-6032077b056b/electrical_installation_symbols_for_drawings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb3e1b6-976d-4c4a-ace3-931c3272c309/how_much_does_a_bachelors_degree_in_marketing_make.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5576 bytes
SHA-256: ec3b93d327a623493e6da7a0e44caa905cd1bfce1436744c010e87f4395af326
font_01_sfnt_off00010b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B59 11408 bytes
SHA-256: b92e7e56ef0042ffab7bd1942afa780a6e09974c3c880eb320da1c17ca02ee6f
font_02_sfnt_off00013289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13289 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e