Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5cf3c6627e38f34…

MALICIOUS

PDF

66.3 KB Created: 2021-02-20 15:20:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 49a163f823b43432b000504061876dc8 SHA-1: 0dcbfa5042d3824af0546e427e43ef66abb876b3 SHA-256: c5cf3c6627e38f344d80a1922037cb8f01e8c16caf65fd3feaa2831a469e22c0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=sun+yoba+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fccb9e9ea984.pdfIn PDF document text
    • http://phtech.site/45600774946w9rv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_602eb205d64bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5fe59d21818ad.pdfIn PDF document text
    • http://bred-enligne.com/kurs_angielskiego8mkgb.pdfIn PDF document text
    • http://bigno.space/wezagaxutejuwidufifpayx.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/volezofimudugowebem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_60266a602cc0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_601010d3508c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fdecadddf6ec.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/mukut/vefumerejuxakabubewaf.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/tigisewewojosopepugukor.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/bengali_all_song_free.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_off0000c927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC927 4900 bytes
SHA-256: c6837baf1e8c8b9279755a692b6522e2feca43a6e8cc0b6c25869cadd502db50
font_01_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10256 bytes
SHA-256: 9f6a64f0a94451d654364169a4d47fb94fe2a5517f13104351bd17bf655f8eb6