Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0624cad0c32022…

MALICIOUS

PDF

65.2 KB Created: 2020-12-22 22:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 753de2fae557a142e26ac187ec4ef370 SHA-1: 10203398ab09aef32f6f8a4151b5bddb153dcc34 SHA-256: 9b0624cad0c32022fff363dfdd593c779049a5da3d6a6d50bcba9cdf25d78e59
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://traffset.ru/strik?utm_term=new+york+city+fc+fc+dallas+sofascore, which likely serves as a landing page for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffset.ru/strik?utm_term=new+york+city+fc+fc+dallas+sofascore PDF link annotation
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/933780.pdfIn PDF document text
    • https://riwuwodanujebu.weebly.com/uploads/1/3/4/2/134234990/biwakisu.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/5d1c32240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_5fb4e3dd10b9e.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/0e289.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/9368618.pdfIn PDF document text
    • https://nadaxujapowa.weebly.com/uploads/1/3/4/8/134891343/d63ea1.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/vugubexofowe_beporezasos_wubexetolaros_virizinuko.pdfIn PDF document text
    • https://pipudanino.weebly.com/uploads/1/3/4/7/134708560/5c77deaa95244fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/bootstrap_form_error_display.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf58a0a97599144eee8f5d/1606375584503/spokane_social_security_hearing_office.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/fenubunatipugoxudib.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_off0000c4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 5244 bytes
SHA-256: 8336c019e6d6267082bd6aedfa485fa9f4ae10f62d7b8da412957c4c5cd0f471
font_01_sfnt_off0000d6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 9704 bytes
SHA-256: c9cdc2748439141a8313ed384577ae1e63fcec86f8ecb4f18ee98653b6d66f6f

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