Malicious PDF — malware analysis report

Static analysis result for SHA-256 441b68d98b35bf7f…

MALICIOUS

PDF

72.8 KB Created: 2021-02-26 07:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c969991523ae163a5cb277fb23c05fd9 SHA-1: 501256c04197328745ac2f533328005ceabd3694 SHA-256: 441b68d98b35bf7fe8c0563c356655fd1c429bca9506193748339c87367ac6c0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=how+much+annual+leave+nhs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490529/normal_6032aeeba0402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_603088bf4d666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391314/normal_5ffb2861d6728.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/jcwghgp/vibration_meter_price_in_singapore.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/hp_laserjet_cp1525nw_color_cartridge.pdfIn PDF document text
    • http://resezowuzotul.22web.org/45343157703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fd08a935acff.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/EVhjVgg/73051127156.pdfIn PDF document text
    • https://cdn.sqhk.co/gugexuje/1jcwKge/gugozagupilas.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/jusagi/agile_transformation_coach_certification.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/microwave_turntable_not_turning_and_not_heating.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/tidagakiludapowupus.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/despacito_piano_sheet_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/pejizonunegafenipig.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_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5056 bytes
SHA-256: e4c3c59cf54fef1f0a4365376227ebf14e3fec50619aaf68b47e5ddef538c56a
font_01_sfnt_off0000f362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF362 10264 bytes
SHA-256: 471bbc2c15ada2414f7a0e596afe5ce2a955b7cee91d69bc448db47d9d20d8be