Malicious PDF — malware analysis report

Static analysis result for SHA-256 2276e27a47a95e64…

MALICIOUS

PDF

83.0 KB Created: 2021-05-13 02:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cac7ade54a6d7e5974b474bb98fca10c SHA-1: 72197a0b6015a386d396ad996255bce87ef21a1e SHA-256: 2276e27a47a95e644e78fea824cb8861151dff9c93c72ff9fa3f87861097109d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=how+to+replace+galaxy+tab+s+10.5+battery PDF link annotation
    • http://mgacessoria.online/14455899368a5m8o.pdfIn PDF document text
    • http://normaa-id.com/lusinomurb.pdfIn PDF document text
    • http://ehaberdevlet.com/mn_drivers_manual_audioft7co.pdfIn PDF document text
    • https://gufagopa.weebly.com/uploads/1/3/4/6/134660265/piwidakiditag_vebovuvelit_zezaxaluzajuga.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/sir_arthur_conan_doyle_sherlock_holmes.pdfIn PDF document text
    • https://mexarufuwusa.weebly.com/uploads/1/3/4/5/134599415/gulamad_vasameginete_kasumaze_fojidakutov.pdfIn PDF document text
    • https://dakufosaxem.weebly.com/uploads/1/3/4/7/134771611/mipapavimejaridodor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf1f28c-279a-42bc-a421-7fae9d83e0b6/nelson_textbook_of_pediatrics_19th_edition_table_of_contents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faea879a-af28-4185-a806-332f93c54980/parupobebotufal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32658dec-242a-4a32-a650-af5b0983fa08/21567762314.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/87739447729.pdfIn PDF document text
    • http://tabonozekes.epizy.com/95162518954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16d7874-fdf2-4e33-b06b-80f0f42b279a/how_much_horsepower_does_a_jeep_4.0_high_output_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb98ee74-e3b3-4ac6-9f2c-7cbc86232c82/93615468053.pdfIn PDF document text
    • http://vuzozan.epizy.com/rifedazaromad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712d5539-9ae5-40a0-b5e9-dde0dfe6e482/fiwiti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da87c75c-9b88-44ca-89b9-a1faa73a56ec/pepokaxonifonivel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234dd015-d148-4f96-91a9-5d8c3af72d99/98415352571.pdfIn PDF document text
    • http://lajovaputap.myartsonline.com/een_bestand_kleiner_maken.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_off000105e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E1 5812 bytes
SHA-256: f4f9bd54b85da2ee2be0b39593679fe3da86dd6e44fc1857ce7f3af8c286af3f
font_01_sfnt_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 10884 bytes
SHA-256: 8e015a3f29941f644f581fa09ef66f4c0eb7726fb7c9445328e2fb0a9f99e79a