Malicious PDF — malware analysis report

Static analysis result for SHA-256 60db3e61f93a5a92…

MALICIOUS

PDF

75.3 KB Created: 2021-03-14 01:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 51dfb5b4abe35dff292ede8fcb77ca94 SHA-1: ad920c922459baac523db9b1d990d6f9116a29ea SHA-256: 60db3e61f93a5a92895f5355b6e82a7d68df25b91e6fee1265c11fbd77208d16
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for SEO manipulation to distribute malware or phish for credentials.

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://golowaki.ru/award?keyword=bacterial+transformation+pdf PDF link annotation
    • https://ranilabat.weebly.com/uploads/1/3/5/9/135999147/lunilunopage.pdfIn PDF document text
    • http://zanezobugose.22web.org/palafexamorir.pdfIn PDF document text
    • http://takodevizol.iblogger.org/lixafozuzoketiz.pdfIn PDF document text
    • http://fenellalucynelle.info/vubuj8o699.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/bitiduvazomomisof.pdfIn PDF document text
    • http://zajozin.22web.org/98587868508.pdfIn PDF document text
    • http://gk-kuban.ru/how_to_enter_info_on_a_form7oosm.pdfIn PDF document text
    • https://tofudilasikota.weebly.com/uploads/1/3/0/9/130969343/438330.pdfIn PDF document text
    • http://groshyk.site/68236662773u2qxv.pdfIn PDF document text
    • http://kokilubowo.22web.org/psychology_internship_report_slideshare.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/o_que__relatorio.pdfIn PDF document text
    • https://mitezexevas.weebly.com/uploads/1/3/4/5/134525922/wuripekafo.pdfIn PDF document text
    • http://dektesheff.xyz/corporate_strategy_definition_business_managementsc9nc.pdfIn PDF document text
    • http://korecos.ru/37888209794nviy3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_482ab66e340b4d56abbe04969e8eb63b.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_9f95c6dfaf254a91841826735927140b.pdf?index=trueIn PDF document text
    • http://rususekobijo.myartsonline.com/72637022884.pdfIn PDF document text
    • http://kowejanaf.rf.gd/dell_20_lcd_2007fpb.pdfIn PDF document text
    • http://gamovomubapo.rf.gd/best_excel_charts_to_compare_multiple_data_points.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/english_listening_podcast.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_98d9c7bb383740148aec5d70f18c76e0.pdf?index=trueIn PDF document text
    • http://xopidevuk.rf.gd/augusten_burroughs_magical_thinking.pdfIn PDF document text
    • http://merekum.rf.gd/double_sided_adhesive_sheets_south_africa.pdfIn PDF document text
    • http://gelidug.epizy.com/android_emulator_vs_ios_simulator.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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 5348 bytes
SHA-256: 7723ed5079a91d3e094240990bfa79ebc7e0d01b674ef2e64ef5341f0bea651c
font_01_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 11376 bytes
SHA-256: a13a1b1e42222ce93c5c8055b6bd2201f256660cde5d58a80bc57796d077ad5e

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