Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2b6aa4a0c79da9…

MALICIOUS

PDF

71.4 KB Created: 2021-02-13 15:54:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 243c5b0c6bc81f15f7eedca1de7e615c SHA-1: 099f94dbfab5f160dcdc6bb0183414a97c767694 SHA-256: 1b2b6aa4a0c79da993aa2f05c1ae953da3ffec911fe11f3dc570543153e28283
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://baarspo.ru/wix?keyword=inverse+variation+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427293/normal_601dc83874d54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471946/normal_5ffd41106c0c1.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/mihvGwO/wikujajapavijoxovo.pdfIn PDF document text
    • https://cdn.sqhk.co/wevosevob/5jaiiib/kazisum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_6026867f0d57d.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/2vnhbjf/parentplus_portal_login.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/VP9qhby/9601418341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_5fdbf6d5eb4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_5fe8bd1fefa13.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/ggffshi/good_piano_lessons_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371509/normal_5febb13f24118.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/jivamubug/dissertation_template.pdfIn PDF document text
    • http://sejekaxupoze.epizy.com/exclamatory_questions_answers.pdfIn PDF document text
    • http://zisigogemewuju.epizy.com/pabedirafawafizorafevinit.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/ximatapaparafiketabib.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/pizunutopitukes.pdfIn PDF document text
    • http://tifureboriva.epizy.com/benanijasofipudinugekizu.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/48278358054.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/jodox.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_off0000dc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1C 4892 bytes
SHA-256: e8028adc3f158be64a53a907a6e00119c674d72b66a3d9ff561f35b7834f2328
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 10412 bytes
SHA-256: 74470264ec2027f3f74eb867edb1a56d3d3c6f8a94c0458490b784461dd56bfd