Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcad65dd3f4932a…

MALICIOUS

PDF

70.3 KB Created: 2021-02-10 09:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ec5c598296432e42dd5d373645d22f2b SHA-1: 12dc17d6dde7260d174735cf03f36f88a4343c81 SHA-256: 4dcad65dd3f4932a770f4f61f32178475177b48e09210a7ea8247d4c4ba2d635
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://druttle.ru/wb?keyword=best%20face%20sheet%20mask%20korean PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476569/normal_6004cc3f4a6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_6019c6cb0d46f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470678/normal_5ff92b5f2dc27.pdfIn PDF document text
    • http://lutefofojonu.iblogger.org/forigilipapinovolukawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5febc4dc25a1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417817/normal_5fc9e036f3eda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600a860341cba.pdfIn PDF document text
    • http://ziduruwekomowob.iblogger.org/15624112606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_602070901e9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_6015d933319a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fc8346aac4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_6015301317016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ffdb689e8ca7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaligapuk.epizy.com/amleto_testo_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/broken_promises_movie_south_africa.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_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 5204 bytes
SHA-256: 51a05fe9a92c4d05ef7c50b82e4d1076ed8e3ad007744eb2e9437f60f3c1a59e
font_01_sfnt_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 10460 bytes
SHA-256: 8c8b65c8e40b1721636333fdb6b3069043e26b5234aecc5edc94a3e816dcdbc9