Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afdcf78ee129333…

MALICIOUS

PDF

74.4 KB Created: 2021-02-08 22:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ef461fbfff8086eb7fc7602a5b9edaa4 SHA-1: 34f2b7214416d4913f6a1ba94a46e3736695f358 SHA-256: 3afdcf78ee1293332399dd2bb9485f3b273a1a82db37bb169a21fa9b41b42964
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=flower%20shop%20design%20guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_5fd9a1a9dcb99.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/n69moji/fuxazazigopemut.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/nopisakulomipuej5k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_600bc629dab71.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/hgfjinh/38147611417.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/ihf9hb5/link_healthcare_nz.pdfIn PDF document text
    • http://help-service-support.com/34128787636pj30u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ff5c12fba04f.pdfIn PDF document text
    • http://optarfes.com/38013572681ketpn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5fdc4ec51e899.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/kegovev/camscanner_pro_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/84237405913.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/tamil_movie_bhagavathi_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/kivabi.pdfIn PDF document text
    • http://lewuxiboru.epizy.com/58700696198.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_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 5060 bytes
SHA-256: ebb0f22867bf7dcce5664e07261e3ba0b115cf245fa93b190baffc44d792e435
font_01_sfnt_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 10756 bytes
SHA-256: 914b7e6c03a3d30364d51976de285ab48304da1733b457d973ed86341011eed9