Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a0f35e31c1246f…

MALICIOUS

PDF

73.7 KB Created: 2021-02-21 07:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9cfca8765e587371707a175ebb4d679b SHA-1: f001090f31d07e14b200947abc8b3eb3a0dd88dd SHA-256: c1a0f35e31c1246fcd6ec46575b7c49ece2c2f5e9f0b8f39e6ec4e305869cffe
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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/wb?keyword=que%20significa%20la%20palabra%20ignominia%20en%20la%20biblia In PDF document text
    • https://xemedibapasuv.weebly.com/uploads/1/3/2/6/132695509/dekesojizi.pdfIn PDF document text
    • http://myyshooop227.site/my_summer_car_saves0ksn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376866/normal_5fe3dbb422335.pdfIn PDF document text
    • http://sodalabs.club/51232491469ah51i.pdfIn PDF document text
    • http://korecos.ru/kinesiology_textbookg5rdo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409814/normal_6008b229cae00.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/what_is_the_difference_between_keto_and_wheat_belly_diet.pdfIn PDF document text
    • http://discovljzg.fun/what_is_meant_by_autonomyljta2.pdfIn PDF document text
    • http://instas.site/difference_between_hadith_and_sunnah_in_urdumyz4t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_602ebe2814971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_60271babe5b7f.pdfIn PDF document text
    • http://cetly.xyz/lojobazezunexafmqarh.pdfIn PDF document text
    • http://nyvelsets.online/us_intervention_in_latin_america_timeline4ff5r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokikeka.epizy.com/fusadoparurugivuxonol.pdfIn PDF document text
    • http://jebanodubefa.rf.gd/botofipin.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_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 5536 bytes
SHA-256: 45840175c4cf07fa7e698dc162944dfed8a95a21bd8600ad27ef50ddb3e21fc2
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 12876 bytes
SHA-256: d4c049954599e8eb7e5425887951c27c0dac195596bd4f38ecdddf9e1986c06c