Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a8b3aecc853f2f…

MALICIOUS

PDF

72.8 KB Created: 2021-02-05 12:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 77b382146dc6c038681fb4bed709b6bf SHA-1: 5bc94955d65763b363148f87ffb8643950827369 SHA-256: a2a8b3aecc853f2f61c4a8ced6f737f6e498b6c0e761db8609d595fc0d90cf19
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/aws?utm_term=beautiful+full+hd+pictures In PDF document text
    • http://cashbackmoney.info/mekipozizexovuziz1fg.pdfIn PDF document text
    • https://cdn.sqhk.co/golizojuw/kijujfd/6520000884.pdfIn PDF document text
    • http://appless.space/lesson_3._1_practice_a_geometry_answerscnbjf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369903/normal_5fc671d5a9199.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/uyhahaE/just_jigsaws_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5fccd5eb1e725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fdda681cbebb.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/cabrestante_manual_5000_kg.pdfIn PDF document text
    • http://gradstroy.su/shareholder_returnc9f5b.pdfIn PDF document text
    • http://republvinb.fun/zinoxabadaqa3ex.pdfIn PDF document text
    • https://cdn.sqhk.co/nilamemiw/ifEhiET/xonix_gra_online.pdfIn PDF document text
    • http://hustlinmoney.com/ceh_certified_ethical_hacker_practice_exams_download81wp1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405930/normal_5ff162a9a49e0.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/salade/jeziwetotofoborilodaxas.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/kutamorolowamejokogikig.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/excel_vba_dim_sheet_as_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/20575003456.pdfIn PDF document text
    • http://zenowalu.rf.gd/free_disney_luggage_tag_template.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_off0000e108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE108 5292 bytes
SHA-256: 1b523602630bccde5881c7336d6028c8bc88a983120e553fa30727e01bde8b0e
font_01_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 10316 bytes
SHA-256: 2ee05df560fbde3f896e213193f4059c2d1a051b6ded40a06cef4e40d73ba78d

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