Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7fc18c5f24d1c1…

MALICIOUS

PDF

100.0 KB Created: 2021-03-29 10:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c20f2693798e7f3ae33e68391d3c129 SHA-1: 98ebc26a13b709e7a90dfb9539b0fe3b776fd599 SHA-256: ee7fc18c5f24d1c149a04a1f31797c01ea7151364853bb0d3bf4a94e6a4d85ca
186 Risk Score

Malware Insights

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

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 0.9993

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://xajibur.ru/wix?keyword=jean+genet+funeral+rites+pdf PDF link annotation
    • http://item-get.top/23797955204e5yog.pdfIn PDF document text
    • http://beautysss.site/6688141779ob2kc.pdfIn PDF document text
    • http://rastet-malysh.ru/ecological_stoichiometry_bookgoxoh.pdfIn PDF document text
    • http://winnerslm.space/bovudimolobudowimaluzojan352q8.pdfIn PDF document text
    • http://useraisins.pro/miwiro2byzy.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/a1N8gd0/98293493945.pdfIn PDF document text
    • http://smcjd.com/tomcat_8._5._31q6pv6.pdfIn PDF document text
    • http://cetapp.xyz/my_dishwasher_isnt_draining_waterga64h.pdfIn PDF document text
    • http://stassikorskyi.com/how_do_you_do_a_double_crochet_for_beginners0ul09.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/d94hjid/police_officers_shot_this_week.pdfIn PDF document text
    • http://nosinoski.shop/do_green_smoothies_make_you_lose_weightjbmeg.pdfIn PDF document text
    • http://getdouche.xyz/themathworksheetsite_coordinate_planebxfom.pdfIn PDF document text
    • http://italiahot.space/sutumepofefudumufamepadita9z7.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/jiSjbJw/aqua_water_park_lake_las_vegas.pdfIn PDF document text
    • http://streamsweets.com/excel_spreadsheet_templates_for_budgetzbut8.pdfIn PDF document text
    • http://karnaval.host/case_files_anatomy_freeesvti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_ef649382bcfc4af3a8a53f624bdeccc4.pdf?index=trueIn PDF document text
    • https://72dfff08-f6cb-4f5d-aaac-ebe71175d6a6.filesusr.com/ugd/c268f7_20964f5cea9a4cfb83c2f538398d1096.pdf?index=trueIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_faaa4add8d50498f9d5b70ff4c327d28.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_53c93a75e51649578afcc4da3bf2056b.pdf?index=trueIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_08085b6e249e4e828812b06e9d6d0f9d.pdf?index=trueIn PDF document text
    • https://4b3b4da4-1145-40fd-8a04-0ac29766dab0.filesusr.com/ugd/6c6203_4983fdcdb7864eea9c838808a1c2b749.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_99fff909de3f416ba4a71f860c590352.pdf?index=trueIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_d51a54ceecb54db48ec798bcdb665472.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_93b9e9378be64eac9017bcead22fe54c.pdf?index=trueIn 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_off000145ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AD 5200 bytes
SHA-256: 3dafd4b6823c4d9c5e2023197c45bbe8354cb4280903d7c5c61d34e80e4a6fa4
font_01_sfnt_off00015775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15775 13596 bytes
SHA-256: 2eaeea442e50730c46d891e2443dc957f58210c37cd48acb74d03c0baa23fbfc