Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f6bcfa8b4a36f6…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 07:11:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a89d4c4f0faa88902c579236699656aa SHA-1: e2108bc770c3b92fde7e4597960902ea35cea3ef SHA-256: 52f6bcfa8b4a36f6f3f2092766bbd5db71afeafc0382a2c63fe705eded662b87
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs, including one pointing to 'https://kuzutuzo.ru/strik?utm_term=navien+ch+180+error+codes', suggesting a phishing or SEO spam campaign. The presence of embedded links and the overall structure indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=navien+ch+180+error+codes PDF link annotation
    • https://cdn.sqhk.co/guvelebul/gdCPjf7/78345633371.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/20899600982.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393488/normal_5fdf68c29b4b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fefc2431a2ae.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/f2hgfja/recarga_amigo_entretenimiento.pdfIn PDF document text
    • https://refiraledekire.weebly.com/uploads/1/3/4/7/134715744/a8b5587a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406497/normal_602aa4f8c4120.pdfIn PDF document text
    • https://lalexitadonu.weebly.com/uploads/1/3/0/7/130776325/2758416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_6009feb54042e.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/on_the_road_full_movie_online_watch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_6019ab024258e.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/ZRgdjim/92841483896.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/20cc056.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegizeso/huwqiSo/any_year_calendar_template_word.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/puwodi-bizelepidibuba-tosefefupenaweg-rofuxetiwotemo.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/kawotexulozax/penatuwafukototuli.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/13_year_old_boy_gift_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/english_language_proficiency_test_for_teachers.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/kokumokigalosarudiw.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/cuanto_m2_tiene_un_metro_cuadrado.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/queen_captain_s_platform_storage_bed.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/network_security_administrator_salary_canada.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_off0000f03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03C 5412 bytes
SHA-256: b814767d38e894035958fd308420534a36f0a24d3b3606ebc8a36a8bf596b6a8
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 10292 bytes
SHA-256: 2e9ba0a0de61631069a0d7cac48300b730e99a6f82fdc8c674fa24842bc14d15

Open this report in the interactive analyzer, or submit your own file for analysis.