Malicious PDF — malware analysis report

Static analysis result for SHA-256 73784c03022e551e…

MALICIOUS

PDF

78.1 KB Created: 2021-02-12 05:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 18bf178b39b743ea7b7cb6a4a0a07e86 SHA-1: 3db92768790fc7f7a06b1d9bf89ef92b4fe2bad7 SHA-256: 73784c03022e551ed57defd2ea9280289b70b1704f1df86a866bc78ef745a41e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=pine+grove+middle+school+phone+number PDF link annotation
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/b526163.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/zavufejufuwax-mufetipadu-teviguli-nobexugo.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/biserubejuxoboromema.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jUYiJje/newcastle_rugby_league_1908.pdfIn PDF document text
    • http://dipufuvolog.iblogger.org/merowojososejadixumab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_601570d7c19d4.pdfIn PDF document text
    • https://cdn.sqhk.co/luvunugoz/ieijSQv/dog_bubbles_peanut_butter.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/VrbDZjb/kegazivadag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_6014b09caf0f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_5fdc2e7d1922d.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/xifibawuk.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/wapabefizosumi/aggregate_spend_reporting_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/anarkali_2015_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/90187576750.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/55136883330.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/neoliberalisme_dalam_hubungan_internasional.pdfIn PDF document text
    • http://xugidujesu.epizy.com/weather_report_for_belleayre_ski_resort.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/wupipapibolatage.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_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5476 bytes
SHA-256: d92f85c06c0b0ee6adcca24bf853b31c8a7b7cf8b9be65d6bc152ec8195f1d52
font_01_sfnt_off00010842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 10264 bytes
SHA-256: cbbdb90016e5d35839004db633a4fa3d4dc22b2e9a7d5e44ae900112a5e82cb1

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