Malicious PDF — malware analysis report

Static analysis result for SHA-256 085773f7aaa7c8a3…

MALICIOUS

PDF

86.6 KB Created: 2021-02-25 15:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 38bcbff07498d21978eeb1c4995aae57 SHA-1: 11169153e9f5fd28122eacf2aad0ae6662e5a385 SHA-256: 085773f7aaa7c8a3387ebe3727847eb747f9f82b84525125c6a3a49dc6e21832
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users. The primary URL, 'https://bologen.ru/strik?utm_term=que+es+la+composicion+en+lengua+y+literatura', suggests a phishing or scam attempt by mimicking search results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8892

Heuristics 4

  • 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
  • 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://bologen.ru/strik?utm_term=que+es+la+composicion+en+lengua+y+literatura PDF link annotation
    • http://betijeduw.getenjoyment.net/36711054467.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/2302537.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/fusebofezesijunori.pdfIn PDF document text
    • http://xajoraxi.22web.org/drama_adolescence_medley_sub_indo.pdfIn PDF document text
    • https://xaroduzorosu.weebly.com/uploads/1/3/1/3/131398324/basidupiwerito_fenawo_vupifugiwijapot.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/what_is_robinhood_trading_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dupivet.epizy.com/22844886758.pdfIn PDF document text
    • http://malinaliwul.epizy.com/templateref_vs_viewcontainerref.pdfIn PDF document text
    • http://siwerixu.rf.gd/bendy_and_the_ink_machine_apk_apkpure.pdfIn PDF document text
    • http://bemurulorax.rf.gd/edit_files_free_mac.pdfIn PDF document text
    • http://lavewas.epizy.com/apache_tomcat_version_9_free.pdfIn PDF document text
    • http://bafutosuxaki.rf.gd/babyletto_mini_crib_sheets_canada.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/whats_the_difference_between_pass_by_reference_and_pointers.pdfIn PDF document text
    • http://sonituzesubilit.epizy.com/pokemon_volt_white_2_guide.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/zisebil.pdfIn PDF document text
    • http://ripazek.epizy.com/familial_hypercholesterolemia_guidelines_2018.pdfIn PDF document text
    • http://runozozupegefo.epizy.com/postpartum_depression_articles.pdfIn 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_off00011448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11448 5416 bytes
SHA-256: 9f4ca3ecdb175a1a1cdf147fc49333238d011a510ce2cb56c76a6a2ac0efa749
font_01_sfnt_off000126a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A7 12444 bytes
SHA-256: b444d0610dfe8f1a647beb6dc6b82aca845e06ffcde0f51f12167ae4fe63a246