Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1de16519bc94adb…

MALICIOUS

PDF

90.4 KB Created: 2021-02-27 23:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 17d415c616c18f99cdfff48cc065de0e SHA-1: 84985b978405df9636c6fe80915d2354b306f153 SHA-256: a1de16519bc94adbc8dbb73e068c810958dda1b9d363ddba63d430f9d6cfcdf4
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://xajibur.ru/wix?keyword=phim+suc+manh+tinh+than+tap+2' is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=phim+suc+manh+tinh+than+tap+2 PDF link annotation
    • http://fafesixokegigi.getenjoyment.net/sovexodevuvavujobume.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/how_to_make_bean_bag_toss_game_board.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/citizen_nighthawk_manual.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/5729014.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/gegoxagazewivobowoforikex.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/original_baltimore_catechism_online.pdfIn PDF document text
    • https://senetawipuguzez.weebly.com/uploads/1/3/5/3/135313667/1238052.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/9372610.pdfIn PDF document text
    • https://joripirido.weebly.com/uploads/1/3/0/7/130776040/folimate_mubosaxal_munugagelat_sasara.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/90181342845.pdfIn PDF document text
    • https://nulumekut.weebly.com/uploads/1/3/4/3/134373747/xufibamirur-nisuseziru.pdfIn PDF document text
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/63fe485f86b83f.pdfIn PDF document text
    • https://jopikivapanip.weebly.com/uploads/1/3/4/8/134854077/2635969.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/toligepup.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/voyager_legend_cs_replacement_headset.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/9670668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukokovevaz.atwebpages.com/oshenwatch_luxe_reviews_consumer_reports.pdfIn PDF document text
    • http://duvodix.myartsonline.com/lobifojijo.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/how_to_use_a_ridgid_miter_saw.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/56174656529.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_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 5176 bytes
SHA-256: a59aa9ceb5bb5c9a97cac947376e18fb730ee191487aa88802a78d773962cbd5
font_01_sfnt_off00013231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 15128 bytes
SHA-256: e7b0d2f2a0c602ca381ed95652258a78da6d6d18ec09852f99c00b670cc141aa

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