Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf89709409a699e…

MALICIOUS

PDF

65.9 KB Created: 2021-02-22 21:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1ff66bd5a11f9094a2745565c46bdb41 SHA-1: 6bbb23ef66d266fa3cddf89a1a7c7045d99e7c2b SHA-256: eaf89709409a699e0bfefea61a71d45a36c0103fabd0e4ea913c26d850988e78
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=wix%20add%20html%20to%20page PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366325/normal_600c421b49ebe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fffafbaaeb7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fc805c86e74a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426816/normal_5fd8bd547c251.pdfIn PDF document text
    • https://senekuzoje.weebly.com/uploads/1/3/5/9/135978249/repazu_napugudonef.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/1hqiehb/70410058588.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5febe9e472474.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/9iiijjg/lady_luck_pinball_machine_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/ijXAjh6/50298982848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fef4656e75bc.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/loneminovu/share_chat_baby_photos_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/94720719037.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/53073298171.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/dyson_dc59_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/atrial_fibrillation_esc_guidelines_2011.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_off0000c592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC592 5180 bytes
SHA-256: da0935d699042edebd5dbca08c3626df7e549e43b7ada8695c05ce00e3cd4c47
font_01_sfnt_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 10452 bytes
SHA-256: d18ef7b9b38c2bfcc75af5842ac11d39fcdd0f0684fbcbd6da27f60214e95c70