Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf1036adc81f2fe…

MALICIOUS

PDF

70.9 KB Created: 2021-02-10 07:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 10a625dda1294732d5e0c3a8e52afc54 SHA-1: 9cb43077f2e9687bd0818a5243a3c8d25d0f7b6e SHA-256: 3bf1036adc81f2fe5772c55a7009dbca13b94d3cd9a1efe9231187d1baca467a
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://crophysi.ru/wb?keyword=android%20central%20galaxy%20s10%20forum In PDF document text
    • http://moneymaya.site/xinejurilobunanepedo1mi.pdfIn PDF document text
    • http://idealica-italiaoficial.site/441774350932pde4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500450/normal_601b482e7fb12.pdfIn PDF document text
    • http://micrometerdigital.xyz/el_contrapunto_musicalkr3ti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_5fc64b399765a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483608/normal_5ffb8d241b60d.pdfIn PDF document text
    • http://drovazvenigorod.ru/xinomokum4gxmz.pdfIn PDF document text
    • http://swiss-gear-top.xyz/bivosikisubovubtz63.pdfIn PDF document text
    • http://onlineeshop24.xyz/kits_del_juventus_para_dream_league_soccer_2019r4k4b.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/guxosa/garmin_mapsource_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/35036562776.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/12750828501.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/switching_anticoagulants.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/diameter_of_a_circle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/workforce_planning_definition.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_off0000d87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87B 5692 bytes
SHA-256: 00003808eebf31086bfdc7c52b7f15e97a6a29c51e092e8cdeb9a77f122d85ae
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 10156 bytes
SHA-256: 54999a8730ac611be9d1c7c6cdf87b351763b0755b9699ffa4a08a8c08b872b3