Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4219ca73c7a4a4…

MALICIOUS

PDF

73.4 KB Created: 2021-01-21 11:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8f58fd010a78044090c6796684ccbf50 SHA-1: 21162db0e457b4fb0d84005341d4e9e5aa3d4439 SHA-256: dc4219ca73c7a4a4b64c7ea95ff2c224925d6d2286f97310807be7b989dfff4b
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://yafferge.ru/wb?keyword=two%20dots%20over%20o%20latex In PDF document text
    • https://site-1177244.mozfiles.com/files/1177244/carbohydrate_metabolism_disorders.pdfIn PDF document text
    • https://site-1216672.mozfiles.com/files/1216672/cdc_guidelines_environmental_infection_control_healthcare_facilities.pdfIn PDF document text
    • http://morasufas.iblogger.org/53641210144.pdfIn PDF document text
    • http://lefefegibilapo.22web.org/informacion_sobre_los_alimentos_transgenicos_a_favor.pdfIn PDF document text
    • http://tevopose.66ghz.com/nokori.pdfIn PDF document text
    • http://golivexi.22web.org/69458852692.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/infobells_tamil_nursery_rhymes_hd_free.pdfIn PDF document text
    • http://zeraseb.66ghz.com/small_business_meaning_and_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofirog.epizy.com/pevejifegizi.pdfIn PDF document text
    • http://rakemexovujepez.epizy.com/ad_agency_internship_report.pdfIn PDF document text
    • http://xesesopid.rf.gd/1165111369.pdfIn PDF document text
    • http://kabitivawenavox.rf.gd/alaska_the_last_frontier_season_1.pdfIn PDF document text
    • http://fepavipa.epizy.com/doxufuka.pdfIn PDF document text
    • http://buketoxepebaf.epizy.com/cellular_respiration_ap_bio_lab_report.pdfIn PDF document text
    • http://luwegovufa.epizy.com/bamaz.pdfIn PDF document text
    • http://wuwedutukuw.epizy.com/unlock_bootloader_xiaomi_mi_a2.pdfIn PDF document text
    • http://banumekopi.epizy.com/zogevorutujebenot.pdfIn PDF document text
    • http://buwumipulufi.epizy.com/eluviation_as_a_soil_forming_process.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_off0000e290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 4988 bytes
SHA-256: e7872b533ea062f0c5e3483d47c2b00e4249dfbcaab58b1b636d71ad6312fc93
font_01_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 11008 bytes
SHA-256: 3d6f944ad4a5db1063a4749c4445dd04b8f60efa8ce371af8c257f1680f591e1