Malicious PDF — malware analysis report

Static analysis result for SHA-256 43daa70f504face2…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 11:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 45f4f48728e87df0d2d5a55c67d848ab SHA-1: d1b6fcf54055c98dc0ecde30d8e4961ecf39b107 SHA-256: 43daa70f504face2298a1a39171627efb5456ef1fd2ceb8e54fee96c20366c53
244 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
  • 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 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.
  • 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/award?keyword=navy+bmr+study+guide+reviews In PDF document text
    • http://mitisavad.getenjoyment.net/kenmore_high_efficiency_top_load_washer_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413456/normal_5fe7b7c10e89e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445128/normal_5ffd471218257.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/ifJJhfA/71523602675.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/rexifutiza7cn2e.pdfIn PDF document text
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/wikizimabon_tiwididum_sepobuveg.pdfIn PDF document text
    • https://wilasumoleliwu.weebly.com/uploads/1/3/1/4/131414134/nefopunux_wuzijapoval.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/oggmid1/barrett_jackson_2020_tv_schedule_canada.pdfIn PDF document text
    • http://hisgohar.site/dugatanupevs7zcj.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/what_is_the_3rd_estate_french_revolution.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/bjhwnhi/7843523701.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/jhiggiL/vietnamese_knife_fighting_name.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fc8bad8be715.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimarol.myartsonline.com/79453466093.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/lactancia_materna_posiciones_para_amamantar.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_off0000da57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA57 5476 bytes
SHA-256: 900f79942c47feb8307d19784b1be1620fb4afa15f89454be33e1d94d8997a8f
font_01_sfnt_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 10120 bytes
SHA-256: 7fb446a913a0dd64b1ac691e274424f82a54d489cd58cae1656b277d6ff78e33

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