Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8a3ecb49b04b7c…

MALICIOUS

PDF

64.9 KB Created: 2021-03-01 17:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d3251d852c620c227de923a22655cf8c SHA-1: 50dc6b8049c8d23b7dd35bdd293b5f973b4d248c SHA-256: ba8a3ecb49b04b7c5c684c225118af2d490e53b543f01fc9f142d37b91882b4a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://midufefew.ru/wix?keyword=beverage+density+lab+pre+lab+answers PDF link annotation
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/4581528.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/7867545.pdfIn PDF document text
    • http://anyita.space/79036422805s7kji.pdfIn PDF document text
    • http://idealica-co.site/set_theory_examplesr217q.pdfIn PDF document text
    • https://kodopexo.weebly.com/uploads/1/3/4/6/134693050/dirusuworijere_kasizujujeniwe_pisakotekanik_vikuzugo.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/kuwurisukagizaboti.pdfIn PDF document text
    • https://biwamuneluzotip.weebly.com/uploads/1/3/2/6/132696598/rerub.pdfIn PDF document text
    • http://mebelrostov.ru/9126582504ks9co.pdfIn PDF document text
    • http://myshoes.moscow/how_to_show_the_entire_dataframe_in_pandascyfl6.pdfIn PDF document text
    • http://xipevufizokev.iblogger.org/gokiwomokuwop.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/jofunozuzof/29373651227.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/notoguzukopemijirefe.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/ser_and_estar_present_tense_worksheet.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_off0000c21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21C 5568 bytes
SHA-256: b9deead8ee07a6a1456ad564ae7e3719eac9bcdd3104a8a6e9170a6c31afb051
font_01_sfnt_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 9932 bytes
SHA-256: 09c37dafab16b5edff6bebbf85640829aa164ed8d1a798034084f582bd931c45