Malicious PDF — malware analysis report

Static analysis result for SHA-256 495b6cdb0d631f72…

MALICIOUS

PDF

72.3 KB Created: 2021-02-13 23:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e18ab736f34d19fbf2d070d33831acdd SHA-1: 9ec7e4447bd0fa6033fd8dc057d9b83333ee3d27 SHA-256: 495b6cdb0d631f72b058e2c4070fd36e5f03329cb945956181152fc41375b7b6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=large+central+vacuole+in+plant+cell PDF link annotation
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/diduwiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_600e00503f25f.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/bapulavore-nenaxisuv-sisufuku-nikajiregu.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/tagilagutide.pdfIn PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/tedajepuxami-pabefatuxem-wenarov.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/ketubefodido-selebigabaluso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427300/normal_5fc9ec153ccb1.pdfIn PDF document text
    • http://tufumutux.22web.org/retodi.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/1ee2e0a6.pdfIn PDF document text
    • http://lafuvenilimagi.iblogger.org/uniform_crime_report_by_state.pdfIn PDF document text
    • https://vujezogovi.weebly.com/uploads/1/3/5/3/135348950/gafoxibowusemesugaxe.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/4543660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://velidukaka.epizy.com/marco_island_backwater_fishing_report.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/isobel_mair_school_hmie_report.pdfIn PDF document text
    • http://godutugogusapa.rf.gd/lixuwavabepugal.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_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 4924 bytes
SHA-256: 78b3ac06bf8e17d6f6dacdc31f6ba7071c8d5bb20be7c0c5d9a812f78f15734b
font_01_sfnt_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 10296 bytes
SHA-256: dfc4b16b4df0bac4b924ad7ba22ba38f88a40f6db9b5df593af950620213ecda