Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e25dd5d1c69ae4…

MALICIOUS

PDF

67.0 KB Created: 2021-02-25 13:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 20a71b9d360fe448dd360e80c8d173b7 SHA-1: 84628e02a421266040b6cac44868d2412adf0504 SHA-256: b1e25dd5d1c69ae4fba6c908c7fb41e6cd15404548f7cdade276f1c1dee5d7c1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=keychain+lighter+instructions In PDF document text
    • https://cdn.sqhk.co/bosareke/TjhAjew/crossing_the_delaware_river_answer_key.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fdae13de2f59.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/16000348686.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/4aY45YQ/alien_warfare_trailer_castellano.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/77411297690.pdfIn PDF document text
    • http://pepufur.22web.org/69683026039.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/excel_vba_array_formula_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fe93c894208d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_6004043e491b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_602dab79908ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402244/normal_5ff2064502476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vowurereluvox.epizy.com/takuxupulepufesuki.pdfIn PDF document text
    • http://widifusi.myartsonline.com/15659526593.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/34947425974.pdfIn PDF document text
    • http://rojepubaxogo.epizy.com/simple_compound_complex_sentences_worksheet_5th_grade.pdfIn PDF document text
    • http://tefetuzuzip.myartsonline.com/john_deere_compact_tractors_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/half_blood_prince_spell_book.pdfIn PDF document text
    • http://gedonoseg.epizy.com/turkish_airlines_feedback_form.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_off0000cb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB45 5132 bytes
SHA-256: 1d4dfca1718918fea959fb7ec4b845aef72122200cdf128a2617020c32d3f65f
font_01_sfnt_off0000dcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 10044 bytes
SHA-256: 61d17e234220984cfe2c9d3ab8a049d627fed25000eeca0af424b41b97d1a140